1. SCOPE ……………………………………………………2. REFERENCES 3
3. DEFINITIONS 4
4. DESIGN AND CONSTRUCTION FEATURES4.1 Pressure and Temperature Limits 4.2 Flanges 4.3 Casing ………………………………………………..5. GENERAL INFORMATION 5.1 Application 5.2 Tests …………………………………………………..
5.3 Nameplates 16
5.4 Preparation For Shipment 6. DRIVERS, COUPLINGS, AND BASEPLATES 6.1 Driver Selection 6.2 Couplings 17
6.3 Baseplate ……………………………………………6.4 Shaft Alignment
1. Scope
1.1 This specification prescribes the minimum requirements for Sealless Horizontal End Suction
Centrifugal Pumps for Chemical Process. Compliance to ANSI (American National Standards Institute) /
ASME (American Society of Mechanical Engineers) B73.3M-1997, Specification for Horizontal End
Suction Centrifugal Pumps for Chemical Process, is required as modified by this specification.
1.2 Paragraph references shown in sections 4 through 7 in this specification correspond directly to
paragraphs in ASME Standard B73.3M-1997 and each denotes a change and is prefixed by: Modify to
Read (Mod) which introduces a requirement that modifies a requirement in ASME B73.3M. Addition (Add)
Inserts requirements that are in addition to the requirements in ASME B73.3M, and Deletion (Del) which
deletes the requirement of ASME B73.3M.
1.3 This specification supplements the datasheets on which the operating conditions and special
requirements are listed in detail for each individual pump. Whenever the data included on the individual
datasheets conflict with this specification, Supplier shall resolve conflicts with SABIC.
1.4 Compliance with this specification does not relieve Pump Supplier of the responsibility of furnishing
pumps and accessories of proper design, mechanically suited to meet operating guarantees at the
specified service conditions. Nor does it relieve Pump Supplier of the responsibility of furnishing
equipment assembled and prepared for shipment in a professional manner.
1.5 Pumps shall be supplied by vendors qualified by experience manufacturing the proposed units. To
qualify, the vendor shall have manufactured at least two (2) pumps of comparable size, model, power
rating, and speed in similar service as indicated in the individual specification and data sheets. These
pumps shall have completed at least 8000 hours of continuous operation satisfactorily.
1.6 Alternate Design
1.6.1 Vendor’s quotation shall conform to this Specification and any addenda. At the vendor’s option, an
alternate quotation may be offered if the following two conditions are met:
a. If there is a significant process or delivery advantage, a superior, more reliable pump design may
be offered. The vendor shall provide the technical justification.
b. Alternate quotation shall indicate deviations from the requirements in this Specification.
Complete details of deviations shall be submitted to SABIC for review.
1.6.2 If vendor’s quotation indicates no deviations from the requirements in this Specification, it shall be
assumed by SABIC; that the pump quoted complies fully with this Specification. Deviation to the
dimensional standards shall be noted in the vendor’s proposal and must be noted on supporting
dimension drawings.
1.7 The pumps supplied to this standard shall have U.S. dimensions and comply with comparable U.S.
standards. SABIC approval is required for pumps supplied with ISO dimensions and ISO standards.
The vendor shall assume unit responsibility for all equipment and all auxiliary systems included in the
scope of the order.
2. References
Reference is made in this specification to the following documents. The latest issues, amendments, and
supplements to these documents shall apply unless otherwise indicated.
2.1 SABIC Engineering Standards (SES)
E06-S01 Induction Motors 150 kW (200 Hp) and Below
G01-S04 Design of ASME B73.1 and General Purpose Baseplates
G06-S01 General Purpose Steam Turbines
G07-S01 General Purpose Gear Units
G01-G01 Guidelines for Pump Minimum Flow Protection
G01-T01 Centrifugal Pumps Inspection & Testing
G23-E02 Typical Process Piping Arrangements to Pumps and Compressors
G20-C01 Installation of Machinery and Criteria for Installation Design
2.2 Industry Codes and Standards
Process Industry Practices Machinery
PIP RESP002 Design of ASME B73.1 And General Purpose Baseplates
American Society for Mechanical Engineers (ASME)
ASME B73.3 Specification for Sealless Horizontal End Suction Centrifugal Pumps for Chemical Process
ASME B16.1 – Cast Iron Pipe Flanges and Flanged Fittings
ASME B16.5 – Pipe Flanges and Flanged Fittings
American Gear Manufacturers Association (AGMA)
AGMA Std 9002-A86 – Bores and Keyways for Flexible Couplings
American Society for Testing and Materials (ASTM)
ASTM A53 – Specification for Pipe, Steel, Black, and Hot-Dipped, Zinc-Coated Welded and Seamless
ASTM A193 – Specification for Alloy-Steel and Stainless Steel Bolting Materials for High-Temperature
Service
ASTM A269 – Specification for Seamless and Welded Austenitic Stainless Steel Tubing for General Service
ASTM A276 – Specification for Stainless and Heat-Resisting Steel Bars and Shapes
Hydraulic Institute
Hydraulic Institute Standard
International Standards Organization (ISO)
ISO 1940 – Mechanical Vibration, Balance Quality Requirements of Rigid Rotors
U. S. Department of Labor
29 CFR 1910 – Occupational Safety and Health Standards
3. Definitions
Air Gap: The distance between the outer magnet ring and the containment shell or, the total radial
dimension between the stator inside bore and the outside diameter of the basic rotor core (armature) prior
to installation of stator liner and rotor liner.
Auxiliary Process Fluid Piping: Is piping or tubing that includes drain lines, product flushing lines and lines
for injection of external fluid.
Auxiliary Cooling Fluid Piping: Is piping or tubing connected to the bearing frame, jackets or pump supports
for the purpose of removing heat from the system.
Axially thrust: The net axial load on the pump shaft caused by hydraulic forces acting on the impeller
shrouds and rotor or inner magnet ring.
Axially split: Casing or housing joint that is parallel to the shaft centerline.
BEP: Abbreviation for best efficiency point, the point or capacity at which a pump achieves its highest
efficiency.
Containment shell: The pressure containing boundary located within the drive end that separates the inner
and outer magnet rings of a magnetic drive pump.
Coupling (magnetic): The attraction of the magnets of the Inner Magnet Ring and Outer Magnet Ring
allowing both to rotate synchronously or asynchronously in the case of a torque ring drive.
Design: Term used by equipment designer and manufacturer to define various parameters, for example,
design power, design pressure, design temperature, or design speed.
Electrical feed through barrier: The static seal in a canned motor pump through which electrical lines feed
the motor stator.
Inner magnet ring: The cylindrical band of magnets operating within the containment shell of a magnetic
drive pump, driven by the outer magnet ring. The inner magnet ring contains the same number of magnets
as the outer magnet ring, and is mounted on the same shaft as the pump impeller.
Inner magnet sheathing: The protective covering of the inner magnet ring in a magnetic drive pump.
Liquid gap: The end of the pump, which converts mechanical energy to kinetic energy in the pumped fluid.
Maximum allowable temperature: The maximum continuous temperature for which the manufacturer has
designed the equipment (or any part to which the term is referred) when handling the specified liquid at the
specified pressure.
Maximum allowable working pressure (MAWP): The maximum continuous pressure for which the
manufacturer has designed the equipment (or any part to which the term is referred) when the equipment
is operating at the maximum allowable temperature.
Maximum discharge pressure: The maximum suction pressure plus the maximum differential pressure the
pump is able to develop when operating with the furnished impeller at the rated speed, and maximum
specified relative density (specific gravity).
Maximum suction pressure: The highest suction pressure to which the pump is subjected during
operation.
Net positive suction head (NPSH): The total absolute suction head, in meters (feet) of liquid, determined at
the suction nozzle and referred to the datum elevation, minus the vapor pressure of the liquid, in meters
(feet) absolute. The datum elevation is the shaft centerline for horizontal pumps, the suction nozzle
centerline for vertical in-line pumps, and the top of the foundation for other vertical pumps.
Net positive suction head available (NPSHA): The NPSH, in meters (feet) of liquid, determined for the
pumping system with the liquid at the rated flow and normal pumping temperature.
Net positive suction head required (NPSHR): The NPSH, in meters (feet), determined by vendor testing
with water. NPSHR is measured at the suction flange and corrected to the datum elevation. NPSHR is the
minimum NPSH at rated capacity required to prevent a head drop of more than 3 percent due to cavitation
within the pump.
Normal operating point: The point at which the pump is expected to operate under normal process
conditions.
Oil mist lubrication: A lubrication system that employs oil mist produced by atomization in a central supply
unit and transported to the bearing housing by compressed air.
Outer magnet ring; The band of permanent magnets securely fixed to a cylindrical frame and evenly
spaced to provide a uniform magnetic field. The outer magnet ring rotates about the containment shell,
driving the inner magnet ring or torque ring.
Pure oil mist lubrication (dry sump): The mist both lubricates the bearing and purges the housing.
Purge oil mist lubrication (wet sump): The mist only purges the bearing housing. Bearing lubrication is by
conventional oil bath, flinger, or oil ring.
Power end: The end of the pump that provides the mechanical energy necessary for the operation of the
liquid end.
Pressure Casing: Is the composite of all stationary pressure-containing parts of the pump, including
nozzles, and other attached parts.
Product lubricated bearings: Bearings and journals that operate in a pumped liquid lubricated environment
to support the shaft of the inner magnet ring of a magnetic drive pump or the rotor assembly of a canned
motor pump.
Radially split: Casing or housing joint that is perpendicular to the shaft centerline.
Rated operating point: The point at which the vendor certifies that pump performance is within the
tolerances stated in this specification.
Rated Shaft Power: Is the power required by the pump shaft at specified rated operating conditions,
including capacity, suction and discharge pressures, specific gravity and all mechanical losses (gears,
couplings, etc.).
Relative density: Property of a liquid; ratio of the liquids density to that of water at 4(C (39.2(F).
Rotor: The assembly of all the rotating parts of a centrifugal pump.
Rotor chamber: The liquid filled cavity bounded by the inside diameter of the stator liner and the bearing
housings in a canned motor pump or the liquid filled cavity in a magnetic drive pump internal to the
containment shell which contains the inner magnet ring, shaft, and bearings.
Rotor liner: The outer sheathing of the rotor assembly in a canned motor pump.
Sealless pump: A design that does not require an external dynamic shaft seal. Static seals are the primary
method of containing the fluid.
Secondary containment: The confinement of the pumped liquid within a secondary pressure casing in the
event of failure of the primary containment shell or stator liner.
Secondary containment system: A combination of devices that, in the event of leakage from the primary
containment shell or stator liner, confines the pumped liquid within a secondary pressure casing that
includes provisions to indicate a failure of the primary containment shell or stator liner.
Secondary control: The minimization of release of pumped liquid in the event of failure of the containment
shell or stator liner.
Secondary pressure casing: The composite of all pressure containing parts of the unit, which are exposed
to pressure resulting from failure of a containment shell or stator liner.
Specific Gravity (SG): Property of a liquid; ratio of the liquid’s density to that of water at 4(C (39.2(F).
Stator housing: The housing in which a stator assembly is mounted.
Stator liner: The member that separates the liquid in the rotor chamber from the stator assembly.
Suction pressure: The liquid pressure at the suction flange of the pump.
Suction specific speed: An index defining the relationship between flow, NPSHR and rotative speed for
pumps of similar geometry. Suction specific speed is calculated for the pump’s performance at best
efficiency point with the maximum diameter impeller and provides an assessment of a pump’s susceptibilityto internal recirculation. It is expressed mathematically by the following equation:
nqs = N(Q)0.5/(NPSHR)0.75
Where:
nqs = suction specific speed
N = rotative speed in revolutions per minute
Q = flow per impeller eye, in cubic meters per second
= total flow for single suction impellers
= one half total flow for double suction impellers
NPSHR = net positive suction head required in meters
Note: Suction specific speed derived using cubic meters per second and meters, multiplied by a factor of
51.6, is equal to suction specific speed derived using U.S. gallons per minute and feet. The usual symbol
for suction specific speed in U.S. units is “S”.
Torque ring drive: A component, which acts as an elastic shim too frictionally position mating cylindrical
parts.
Total indicated runout (TIR): also known as total indicator reading: The runout of a diameter or face
determined by measurement with a dial indicator. The indicator implies an eccentricity equal to half the
reading or an out-of-squareness equal to the reading.
Unit responsibility: Refers to the responsibility for coordinating the technical aspects of the equipment and
all auxiliary systems included in the scope of order. Factors such as the power requirements, speed,
direction of rotation, general arrangement, couplings, dynamics, lubrication, material test reports,
instrumentation, piping, and testing of components, etc., shall be included.
Vendor: The manufacturer of the pump, or the manufacturer’s agent.
Vertical In-line Pump: A pump whose suction and discharge connections have a common centerline that
intersects the shaft axis. The pump’s driver is generally mounted directly on the pump.
4. Design and Construction Features
4.1 Pressure and Temperature Limits
4.1.1 Pressure Limits
Modify First Sentence to Read: The Maximum Allowable Working Pressure of the pump pressure retaining
parts, including the secondary containment, shall be at least as great as the pressure-temperature rating
of ASME/ANSI B16.1 Class 125 or ASME/ANSI B16.5 Class 150 flanges for the material used and shall
be equal to or greater than the maximum discharge pressure at maximum temperature.
Add:
Maximum discharge pressure shall be limited to 1900 Kpag (275 psig) or the manufacturer’s pressure and
temperature design limits of the specified material, whichever is lower.
Comment: The flange rating for some material will limit the pressure below 1900 Kpag (275 psig) at
temperatures above ambient.
Add:
Maximum suction pressure shall be limited to 500 Kpag (75 psig).
Comment: For high specific gravity fluids, maximum suction pressure may be limited to less than of
500 Kpag (75 psig).
Temperature Limits
Modify First Sentence to Read: Maximum Allowable Temperature shall be limited to 149 °C (300 °F).
Add:
With SABIC approval, this specification can be used for services up to 260 °C (500 °F).
Sealless pumps may use product to cool and lubricate the bearings, the product must remain stable as it
passes through the bearings. The vendor shall furnish the temperature and pressure profiles of the fluid
re-circulation flow path through the pump and rotor chamber.
System steam purging or high pressure system flushing may be required to ensure that the pump is
capable of handling maximum process and maintenance temperatures and pressures.
Add:
Hydraulic Selection Criteria
4.1.3.1 Head-capacity curves that rise continuously to shutoff are preferred for all applications. If parallel
operation is specified, the head rise to shut-off shall be at least 10% of the head at rated capacity. The
installation of an orifice plate on the pump discharge is acceptable to obtain the 10% head rise provided
that it is stated in the proposal. If this option is selected, the orifice shall be supplied by the pump vendor.
When an orifice is quoted, the proposal shall include the impact on the standard curves including flow,
head, HP, NPSHR, and efficiency.
4.1.3.2 The normal operating point flow rate shall be greater than the minimum continuous flow rate
specified by the vendor and less than the flow rate at the BEP for the impeller diameter selected.
The Best Efficiency Point (BEP) for the furnished impeller should be between the normal and rated
operating points.
4.1.3.3 Pumps with constant speed drivers shall be capable of a future head increase of at least 5% at
rated flow rate by installing a new impeller. The canned motor or magnetic coupling torque must be
selected to accommodate this future condition
4.1.3.4 The minimum diameter impeller supplied shall be 105% of the minimum diameter impeller indicated
on the generic pump curve for the specific pump.
4.1.3.5 The rated pump differential head required shall be based upon the rated differential pressure and
the lowest specific gravity (SG) fluid.
4.1.3.6 If viscosity corrections are required, head, capacity, and efficiency corrections shall be the
responsibility of the pump vendor. These corrections shall be calculated in accordance with Hydraulic
Institute Standard. Alternate correction factors may be used with SABIC approval.
4.1.3.7 The vendor shall state the minimum continuous flow rate for the pump and whether the minimum
continuous flow rate is based on hydraulic stability or thermal limitations. The larger of the two values shall
be used in establishing the pump’s minimum flow.
4.1.3.8 The vendor shall enter on the data sheets the NPSHR based on water (at a temperature of less
than 65
°
C (150
°
F) at the rated capacity and rated speed.
4.1.3.9 Hydrocarbon correction factors shall not be used to calculate NPSH.
4.1.3.10 The pump suction specific speed shall be limited to 215 (11,000).
4.2 Flanges
Add:
4.2.1 Suction and discharge nozzles and other pressure casing connections shall be standard nominal pipe
sizes (NPS). Openings of 1-1/4, 2-1/2, 3-1/2, 5, 7 and 9 NPS shall not be used.
4.2.2 Flanges shall be designed for through bolting if possible. If alternative methods of flange connection
are required, the vendor shall supply flange details in the proposal.
4.2.3 Suction and discharge flanges shall meet the requirements of
ASME/ANSI B16.1 and B16.5 for parallelism of the sealing face and the backside of the flanges.
4.2.4 Flanges shall have machined faces with a 125-250 microinch (3.2-6.3 µm) Ra finish. Finish shall be
serrated-concentric or serrated-spiral.
4.3 Casing
4.3.1 Drain Connection Boss(es)
Modify to Read: Pumps shall be provided with a boss on the lowest part of the casing capable of
accommodating a case drain, which shall not be drilled and tapped unless a drain is specified. When a
casing drain is specified:
The connection shall be largest possible for that casing up to a maximum of 3/4 NPS.
Ductile iron or cast iron pump case drains shall be drilled tapped and plugged with carbon steel plugs.
Alloy pumps shall be provided with either a drilled and tapped drain with plug of the same metallurgy as the
casing or a short schedule 160 nipple socket welded drain connection that, terminates at the edge and
within the confines of the baseplate, in a flange connection. The piping and flange shall be of similar
metallurgy as the pump casing. When socketwelded is specified, all piping connections shall be welded.
Comment: Socketwelded and threaded case drains may not be acceptable for process fluids that cause
crevice corrosion or polymerization, etc. SABIC will define those applications and the type of drain
connections.
Add:
All internal cavities, including the rotor chamber, shall be completely self-venting and shall be drainable
through a single connection to the pump assembly. If fluid will remain in the internal cavities when this drain connection is opened, an additional connection shall be provided for purging/flushing the rotor chamber.
The vendor shall include the size and location of this connection in his proposal.
Gage Connection Boss(es)
Modify Last Sentence to Read: The boss(es) shall not be drilled.
Disassembly
Modify First Sentence to Read:
The pump casing shall be designed to permit removal of the rotor or inner magnet ring without
disconnecting the suction or discharge piping or the driver for magnetic drive pumps.
4.3.5 Jackets
Add:
There are several available methods of cooling or heating specific areas of most pumps. The following are
examples of acceptable methods and should be available as optional features:
– Pump Casing Jacket
– Bolt On External Steam Jacket
– Bearing Housing Cooling
The pump vendor shall recommend when these options shall be applied.
Jackets for cooling or heating shall be designed so as to facilitate complete drainage for freeze protection.
4.3.6 Gaskets
Modify first sentence to read;
Pump casings shall have metal to metal fits, with confined controlled compression gaskets such as an
O-ring or spiral wound type.
4.3.7 Bolting
Add:
4.3.7.1 Casing bolting for ductile iron and carbon steel pumps shall conform to ASTM A193, Grade B7
and, for alloy pumps, bolting shall conform to ASTM A193, Grade 8 Class 2 or ASTM A193, Grade B7 with
PTFE coating. The coating must conform to DIN 50018 atmospheric corrosion test.
4.3.7.2 The details of threading shall conform to ANSI/ASME B1.1.
4.3.7.3 Internal bolting shall be of a material fully resistant to corrosive attack by the pumped liquid.
4.3.7.4 Adequate clearance shall be provided at bolting locations to permit the use of socket or box
wrenches.
4.3.7.5 Internal socket-type, slotted-nut, or c-type spanner bolting shall not be used.
Add:
4.3.8 Axially split casings are not allowed. Pumps with radially split casings are required.
4.3.9 Pipe threads shall be tapered threads conforming to ANSI/ASME B1.20.1. Tapped openings and
bosses for pipe threads shall conform to ANSI/ASME B16.5.
4.4 Impeller
4.4.1 Impeller Types
Modify first sentence to read;
Impellers shall be fully enclosed, open, or semiopen and constructed as single piece castings.
Add: Fabricated impellers require SABIC approval.
4.4.2 Balance
Modify to read: Impellers shall be dynamically balanced in accordance with ISO 1940, quality grade G6.3
after trimming to the required diameter. If the ratio of maximum outside diameter divided by the width at the
periphery including the shroud(s) is less than six, a two-plane spin balance shall be performed.
4.4.3 Mounting
Modify to read:
Impellers shall be keyed or threaded to the shaft; pinning of impellers is not acceptable. Impellers shall be
secured to the shaft by a cap screw or cap nut that does not expose shaft threads. The securing device
shall be threaded to tighten by liquid drag on the impeller during normal rotation, and a positive mechanical
locking method (for example, a staked and corrosion-resistant set screw or a tongue-type washer) is
required. Cap screws shall have fillets and a reduced-diameter shank to decrease stress concentrations.
4.5 Internal Drive Assembly
4.5.3 Add:
Resonances of structural support systems (base, frame, and bearing housings) may adversely affect rotor
vibration amplitude. Therefore, resonance of support systems within the vendor’s scope of supply shall not
occur within 10% of the operating speed of a fixed speed machine, or from 10% below to 10% above the
operating range of a variable speed machine.
4.5.5 Internal Drive Assembly Bearings
4.5.5.1 Bearing Design
Add:
Shaft stiffness and fluid stiffening of product lubricated bearings shall limit the total impeller displacement
under the most severe dynamic conditions over the allowable operating range of the pump – with maximum
impeller diameter and the specified speed and fluid – to one half the minimum impeller wear ring clearance.
This displacement limit may be achieved by a combination of shaft diameter, shaft span or overhang,
bearing design, and casing design. No credit shall be taken for the fluid stiffening effects of impeller wear
rings. The fluid stiffening of product lubricated bearings shall be calculated at both one and two times the
nominal design clearances.
Product lubricated bearings shall not be supported by the containment shell.
Bearing materials such as silicon carbide with low coefficients of thermal expansion shall have a radial
clearance designed to accommodate relative thermal expansions at the maximum and minimum operating
temperature specified on the pump data sheet.
Bearings shall incorporate groove (s) for heat removal and flushing of foreign particles.
Pumps using only one radial bearing shall not be used for drive powers above 7.5 kW (10 hp).
4.5.5.4 Clearance
Add:
The design clearance of the liquid gap and of the air gap shall be sufficient to ensure that contact between
the magnet assemblies and the containment shell does not occur due to pressure deformation, nozzle
loading, flow variations, thermal expansion or power end bearing wear.
4.5.5.6 Heat Input
Modify Last Sentence:
The pump manufacturer shall provide the temperature rise and the minimum pressure required by the
pump of the internal circulated fluid from minimum flow to maximum flow for a series of five points including
the rated point.
4.5.5.7 Bearing Environment
Add:
SABIC will furnish information on any solids present including particle size, percent and distribution.
Add:
4.5.5.9 Add:
The inner magnet or torque ring material shall be shielded from the process fluid by a hermetically sealed
metallic sheathing. This sheathing material must be compatible with the process fluid to ensure against
chemical attack. The minimum inner magnet sheathing thickness shall be 0.40 mm (0.015 in).
4.6 Containment Design
4.6.1 Primary Pressure Containment
Add:
The containment shell to casing cover joint shall have a metal to metal rabbeted fit utilizing a confined
controlled compression gasket of material compatible with the process fluids and operating temperatures.
The containment shell corrosion allowance shall be .4 mm (.015 in.) as a minimum.
4.6.1.1 Magnetic Drive Pump
Add:
The design shall allow for the inspection of the containment shell without disturbing the pressure casing.
4.6.2 Secondary Containment
Modify the second paragraph to Read:
The vendor shall recommend shutdown devices and procedures.
Modify the third paragraph to read:
The pump vendor shall provide the designs to contain any leakage as stated in a, b & c.
Add:
The secondary containment system shall be rated for the same pressure as the pressure casing.
Provisions for monitoring shall be included in the secondary containment system.
Material of the secondary pressure casing shall be carbon steel as a minimum.
Secondary pressure casings are by definition pressure containing components.
All secondary control and containment system joints shall be rabbeted and sealed with controlled
compression gasket (s), sealed with O-rings of material compatible with the process liquid, or welded.
4.7 External Bearing Design (MDP)
4.7.1 Design
Add:
4.7.1.1 All bearings shall have metal rolling element retainers.
4.7.1.2 Antifriction bearings for oil mist shall be open. Bearings shall not be shielded or sealed.
4.7.4 Sealing
Bearing housing isolator seals shall be provided.
4.7.5 Lubrication
Add:
4.7.5.1 Bearing oil temperature shall not exceed 82 °C (180 °F) based on service conditions and an
ambient temperature of 43 °C (110 °F). Bearing sump cooling coils shall be of corrosion resistant materials
and shall not have any pressure joints or fittings inside the bearing housing.
4.7.5.2 Oil lubricated bearings shall be mounted in an oil-tight housing equipped with a 100 cm3 (4-ounce)
minimum constant level side-outlet transparent reservoir oiler. In addition, a 1 in. minimum diameter sight
glass for viewing the condition and level of the oil shall be provided on the bearing housing. A vent
connection shall be provided at the top of the bearing housing between the bearings.
4.7.5.3 A permanent indication of the normal operating oil level shall be accurately located and clearly
marked on the outside of the bearing housing with metal tags or permanent markings in the casting. The oil
level mark shall be on the same side of the bearing housing as the sight glass is mounted. A permanent
indication on the sight glass also meets this requirement.
4.7.5.4 If oil mist lubrication is specified, the vent connection may be used as the oil mist inlet. The pure or
purge oil mist fitting connections shall be located so that oil mist flows through the bearings. There shall be
no internal passages to short-circuit oil mist from inlet to vent.
4.7.5.5 If pure oil mist lubrication is specified, oil rings or flingers and constant-level oilers shall not be
provided. If purge-oil mist lubrication is specified, a constant-level oiler that does not vent to atmosphere
shall be provided. In either case, a sight glass shall be furnished.
4.8 Stator Assembly (CMP)
Add:
The stator housing of a canned motor pump including the electrical feed through barrier, shall be designed
for the pressure casing maximum allowable working pressure, associated hydrostatic test pressure and
operating temperature range.
4.8.1 Stator Windings
Add:
4.8.1.1 Electrical feed through barrier to canned motor junction box shall be located above the pump
centerline and shall be self-draining into the stator cavity.
4.8.1.2 The connection box shall be sized at least one size larger than the standard IEC (NEMA) size for
the motor used.
4.8.1.3 Motors shall be designed for across-the-line starting.
4.8.1.4 Motors rated below 150 kW (200 hp) shall be capable of three starts per hour when the initial start
is from ambient temperature. Motors rated 150 kW and above shall be capable of three starts per hour but
limited to 8 starts per day.
4.8.1.5 UL, FM or equivalent certification shall be provided.
4.8.2 Oil Filled Stators
Add:
The stator cavity on motors for pumps built for services which have operating temperature of 160°C
(320°F) or less shall not be filled with oil. When approved by SABIC, solid heat transfer material may be
used to conduct heat away from the stator windings. Pumps built for services which have operating
temperatures in excess of 160°C (320°F), shall have ceramic insulated stators or shall incorporate a
cooling system.
4.8.3 Temperature Rating
Add:
Class F is the minimum acceptable class of insulation. Class C insulation shall not be used unless
specifically approved by SABIC.
4.8.4 Motor Design Life
Add:
The stator winding insulation shall be rated to allow the motor to satisfactorily operate for at least 175,000
hours at the maximum rated temperature and flow conditions
4.9 Outer Magnet Assembly (MDP)
Add:
4.9.6 Magnetic coupling assemblies may be either synchronous or asynchronous design. Synchronous
couplings shall be supplied with rare earth magnets. Torque ring drive couplings may be supplied with
either rare earth or aluminum nickel cobalt magnets. The vendor shall state the magnet material on the
proposal data sheet. Alternate designs and/or materials require SABIC approval for the specific
application.
4.9.7 Magnets shall be mechanically retained and bonded with a suitable adhesive.
4.9.8 The pump shall be designed to prevent the outer drive magnet from contacting the containment shell
in the event of a shaft or bearing failure. The design shall utilize a replaceable device of non-sparking
material to eliminate any sources of ignition.
4.9.9The inside surface of the outer magnet ring shall be sheathed with a non-magnetic material to
prevent damage to the magnets or the containment shell upon assembly/disassembly.
4.9.10 Magnetic couplings shall be designed to avoid decoupling during startup and while operating at
rated conditions. The following conditions shall be analyzed by the manufacturer when sizing the magnetic
coupling:
a. Torque required to accelerate the rotor assembly during startup with the job driver and specified
fluid. Starting conditions will be specified by SABIC. Across-the-line starting is to be assumed for
medium voltage motor drives unless otherwise specified.
b. Torque required to pump the fluid at rated conditions of flow, temperature, specific gravity and
viscosity with provision to operate at a 5% increase in head for constant speed drivers or 5% increase
in speed when variable speed drivers are applied.4.10.
4.10 Materials of Construction
Add:
4.10.1 Grey cast iron pressure casing construction shall not be used in flammable or toxic services.
4.10.2 Materials for pump parts shall be in accordance with recognized ASTM material designations.
Superior or alternative materials may be recommended. Material selection for other various parts shall be
shown on the pump datasheets when alternative materials are selected.
4.10.3 Materials shall be clearly identified in the proposal with their applicable industry standard numbers,
including the materials grade. When no such designation is available, the vendor’s material specification
giving physical properties, chemical compositions, and test requirements
4.11 Corrosion
Add:
The Pump Vendor shall state in his proposal the corrosion allowance for all pressure containing parts,
including secondary containment.
4.12 Direction of Rotation
Add:
Rotation arrows (if attached) shall be of austenitic stainless steel or of nickel-copper alloy (Monel or its
equivalent). Attachment pins shall be of the same material. Welding is not permitted.
4.13 Dimensions
Delete:
Delete requirement for baseplate to meet Table 2 or 4.
Add:
The vendor shall furnish all piping systems, including mounted appurtenances, located within the confines
of the baseplate.
4.14 Miscellaneous Design Features
4.14.1 Safety Guards
Add: Coupling guard shall conform to OSHA 29 CFR 1910 and shall be mounted by the pump vendor.
Guard shall not obstruct access to the pump bearing cover or motor end bell to allow taking vibration
readings. When specified, the guard shall be bolted to the baseplate and shall not be attached to the pump
or motor.
4.15 Monitoring Devices
4.15.1 Description
When specified, protective/condition monitoring instrumentation shall be provided.
The following methods may be included:
a. Magnetic Drive Pumps shall be provided with a temperature indicator and switch for pump
shutdown on high containment shell temperature.
b. Canned motor pumps shall be provided with bearing wear monitor and switch for pump shutdown
on excessive bearing wear.
c. Pump power monitoring to detect pump dry-run condition and magnetic drive decoupling. Pump
power shall be monitored with a motor watt meter. The vendor shall specify normal and recommended
alarm and shutdown conditions.
d. Leakage monitoring in the secondary containment area to detect containment shell or liner
leakage for all pumps handling flammable, hazardous, or highly corrosive fluids. Leakage into the
secondary pressure casing shall be monitored with suitable instrumentation mounted and located by
the pump vendor.
Add:
4.15.9 Vapor Pressure
a. For pumped liquid with relatively low vapor pressure (such that leakage would collect at
atmospheric pressure and temperature), an optical moisture sensor and sight glass shall be located in
a collection area of the secondary pressure casing.
b. For pumped liquid with a relatively high vapor pressure (such that leakage would not collect at
atmospheric pressure and temperature), a pressure switch shall be located in the secondary pressure
casing. A secondary sealing device shall be utilized to create backpressure to activate the pressure
switch.
4.5.10 All instrumentation penetrating the secondary pressure casing shall be rated for the maximum
design pressure.
Add:
Auxiliary Piping
4.16.1 All auxiliary piping within the envelope of the pump assembly (pump, baseplate, motor) shall be
included in the scope of supply of the pump vendor.
4.16.2 All auxiliary piping required to make the unit functional shall be designed and installed on the pump
assembly in a manner that prevents vibration and damage due to routine field installation and
maintenance. The piping shall be shipped installed on the pump assembly.
4.16.3 As a minimum, auxiliary process fluid piping shall have a pressure/temperature rating not less than
that of the pump discharge flange.
4.16.4 Except for the seal flush lines, auxiliary process fluid piping material shall have a corrosion
resistance to the process fluid that is equal to, or better than that of the pump case.
4.16.5 Seal flush lines shall be made of seamless tubing with a minimum outside diameter of 3/8 in. and a
maximum of 1/2 in. with a 0.035 in. wall thickness. Tubing material shall conform to ASTM A269 TP 316
unless the pump case is made of a higher grade material. In this case, the tubing shall be made of material
with a corrosion resistance equal to, or greater than, the corrosion resistance of the pump case. Tubing
fittings shall be compression-type and shall be made of comparable or higher alloy than the pump case or
tubing. Choice of fitting material shall consider the effect of galling.
4.16.6 Piping for auxiliary cooling fluid shall be a minimum of ASTM A269
TP 304 or ASTM A276 Type 316 tubing, with a minimum outside diameter of 1/2 in. and 0.035 in. wall
thickness or 3/4 in. schedule 80 threaded or ASTM A53 Type F, T&C galvanized pipe. Tubing fittings shall
be compression-type and fitting material shall conform to ASTM A269 Type 304 or ASTM A276 Type 316.
Cooling water lines shall not be smaller than the connections on the exchanger.
4.16.7 Cooling water piping shall be supplied with an outlet shut-off valve.
5. General Information
5.1 Application
5.2 Tests
5.1.2 Flange Loading
Modify to Read: Allowable flange loading shall be supplied by the pump vendor.
5.1.4 Vibration
Modify to Read: When factory performance tests are conducted, unfiltered bearing housing vibration shall
be measured in the horizontal, vertical, and axial planes. Measurement shall be taken at the pump’s rated
speed ((5%) and at minimum continuous flow and best efficiency point. Vibration limits in any plane shall
not exceed 4.1 mm/sec (0.16 in/sec) RMS velocity. Vibration measurements shall be submitted as part of
the test records.
5.2.1 Hydrostatic
5.2.2 Performance
Add:
Performance tests shall be conducted if any of the following conditions are met:
a. Pumps operating in parallel
b. Suction specific speed is above 215 (11,000)
c. Normal operating point is less than 10% above minimum continuous flow
d. When specified by SABIC
Performance test shall conform to Acceptance Level A requirements in the centrifugal pump test section of
the Hydraulic Institute Standard. The test shall include a minimum of 5 points including minimum
continuous flow and 110% of BEP. The vendor shall provide a certified performance test curve and
vibration data for SABIC’s review and acceptance prior to shipment.
Add:
5.2.4 NPSH Test
NPSH test shall be quoted as an option if the NPSHA minus NPSHR is 0.9 meters (3 ft) or less at the rated
capacity. When NPSH testing is required, NPSHR data shall be measured at minimum flow, rated
operating, and best efficiency points.
Add:
5.2.6 Witnessing
Unless otherwise specified, tests will not be witnessed by SABIC.
Add:
5.2.7 Retesting
If the pump is dismantled for cleaning and drying, the pump will not be re-tested. If dismantling is necessary
for some other required correction, such as improvement of efficiency, NPSH or mechanical difficulties, the
initial test is not acceptable. The pump shall be re-tested.
5.3 Nameplates
Revise First Sentence to Read: A nameplate of corrosion resistant material, securely attached at an
accessible point on the pump, shall be furnished.
Add:
As a minimum, the nameplate shall be stamped with SABIC’s item number which shall not be less than 3
mm (1/8″) high. A supplemental nameplate may be used in conjunction with the vendor’s standard
nameplate. Supplemental nameplate shall be fastened in the same fashion as primary plate. Units of
measurement on the nameplate shall be the same as those on the data sheet(s).
Add:
5.4 Preparation For Shipment
5.4.1 All 4 inch flanges and larger shall have a gasketed wooden cover held by a minimum of four bolts.
Plastic flange covers secured with plastic drive bolts or gasketed wooden cover held by a minimum of four
bolts shall be used for flange sizes under 4 inch.
5.4.2 Unpainted machined metal surfaces, including pump and baseplate machined support feet, shall be
coated with a preservative coating.
5.4.3 After testing, pumps shall be drained of residual water and dried prior to preservation. Pumps made
of ductile iron and carbon steel shall be coated internally with a suitable vapor space inhibitor preservative
prior to shipment.
5.4.4 Alloy pumps shall not be painted. For other parts/components, vendor’s standard paint system is
acceptable.
5.4.5 Components shipped loose to prevent damage during transit shall be properly tagged for reassembly
in the field and boxed. These items shall be attached to, and shipped with, the pump.
5.4.6 The pump shall be shipped with the auxiliary support systems installed and ready for initial service.
5.4.7 Bearing housing internals shall be coated with a suitable vapor space inhibitor preservative prior to
shipment.
Add:
6. Drivers, Couplings, and Baseplates
6.1 Driver Selection
6.1.1 The motor shall comply with SABIC specification E06-S01 and design features specified on the motor
data sheets. The selection of the motor manufacturer shall be from SABIC’s acceptable manufacturers list.
6.1.2 Pump vendor shall determine the rated shaft power required by the pump assembly based on the
operating conditions provided by SABIC. Determination of the rated shaft power shall take into
consideration the following variables as a minimum:
a. Specific gravity
b. Viscosity
c. Mechanical seal(s)
d. Stuffing box pressure/suction pressure
e. Gear assembly
f. Couplings
g. Hydraulic tolerances
Other variables shall be taken into consideration as required.
Motor driver shall be sized in accordance with Table A, as a minimum, unless the above considerations
require a larger driver. If this latter condition exists, the vendor shall state the proposed motor size in the
proposal.
6.1.3 Driver power shall, as a minimum, be equal to the rated shaft power at the rated point multiplied by
the percentage listed in Table A.
Table A
The vendor shall state the motor sizing criteria in the proposal.
6.1.4 If the end of curve power requires a motor less than 4 kW (5 hp), the motor shall be the next
standard size larger than the standard size required to cover the end of curve.
6.1.5 The motor service factor shall not be used to meet the motor power requirements.
6.1.6 Motors shall also have sufficient power to cover initial run-in on water with the pump throttled to 50%
of the rated capacity. If this requirement results in an increase in motor size, the larger motor shall be
quoted as an alternative.
6.1.7 If variable frequency drives are specified, the pump vendor shall negotiate with the motor
manufacturer for proper speed/torque characteristics to meet the pump’s performance demands.
6.2 Couplings (For Magnetic drive pump only)
6.2.1 Spacer-type, flexible, non lubricated couplings shall be furnished for all pumps. The spacer length
shall permit the removal of the coupling halves from the pump and driver shafts and the impeller/rotor and
bearing frame as an assembly without moving the pump case, piping, or driver.
6.2.2 Elastomeric-type couplings may be provided for drivers up to 22 kW (30 hp) at 1800 rpm and 45 kW
(60 hp) at 3600 rpm. Elastomeric members shall not deteriorate due to exposure to hydrocarbon
environment.
6.2.3 Couplings that exceed ratings in 6.2.2 shall be flexible disk-type. Flexible metal disk-type couplings
shall be manufactured in accordance with AGMA Class 8 balancing requirements, as a minimum.
Coupling hubs shall be made of steel. Disk elements shall be made of corrosion resistant material. All
coupling registration surfaces and the outside diameter of each coupling flange shall be concentric with
the axis of the coupling hub within 0.075 mm (0.003 in.) total indicated runout as mounted on equipment
shafts.
6.2.4 The coupling-to-shaft fits shall be Class I clearance fits as defined in AGMA 9002-86.
6.2.5 The minimum coupling service factor based on the nameplate rating of the driver shall be 1.0. The
maximum service factor based on the nameplate rating of the driver shall be 1.25.
6.2.6 Coupling hubs shall not be bored larger than the maximum diameter recommended by the coupling
manufacturer.
6.3 Baseplate
6.3.1 The baseplate shall be designed in accordance with SABIC specification G01-S04.
6.4 Shaft Alignment
6.4.1 Pump and driver mounted by the vendor shall be properly aligned prior to shipment to the
requirements in SES G20-C01. To achieve this alignment tolerance, driver shall not be bolt bound in any
direction and the hold down bolts shall not be undercut or undersized to relieve this condition. Final
alignment shall be the responsibility of the installation site.
Documentation
Add:
7.1.2.8 SABIC will state in the inquiry and in the order the number of prints required and the times within
which they are to be submitted by the vendor.
7.1.2.9 Review of the vendor’s drawings will be made promptly after receipt by SABIC. Such review does
not constitute permission to deviate from any requirements in the order unless specifically agreed upon in
writing. After the drawings have been reviewed, the vendor shall furnish copies in the quantity specified. All
drawings must be clearly legible.
The vendor shall supply cross sectional or assembly type drawings for all equipment furnished showing all
parts, running fits, clearances and balancing data required for erection or maintenance. Typical drawings
are unacceptable.