What types of equipment does this standard apply to?

The application of this standard is primarily for pressure vessels, including heat exchangers. It provides specific guidelines for the installation of a corrosion-resistant strip lining in these types of process equipment.

How does this standard relate to SAES-W-010?

This standard is intended to be considered as a supplement to SAES-W-010, which is a general standard outlining welding requirements for pressure vessels and heat exchangers. SAES-W-010 provides the overall framework for welding practices, while this standard provides additional requirements specific to installing a corrosion-resistant strip lining.

Are there any additional requirements apart from ASME SEC VIII and ASME SEC IX?

Yes, the requirements specified in this standard are in addition to the requirements of ASME SEC VIII and ASME SEC IX. These additional requirements specifically address the welding and testing procedures for installing the corrosion-resistant strip lining in process equipment.

Are there any other relevant considerations?

While this standard provides specific guidelines for the welding and testing requirements, it's important to note that additional instructions or specifications may be included in Scopes of Work, Drawings, or other Instructions or Specifications. These documents should be consulted for any additional requirements or instructions pertaining to the installation of the corrosion-resistant strip lining.

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SAES-W-015 PDF Download

SAES-W-015

Strip Lining Application [SAES-W-015]

SAES-W-015 is a standard that specifies the welding and testing requirements for installing a corrosion-resistant strip lining in process equipment as a field modification. The standard is primarily applicable to pressure vessels, including heat exchangers. It is intended to be considered as a supplement to SAES-W-010. Additionally, these requirements are in addition to the requirements outlined in ASME SEC VIII and ASME SEC IX.

General

In accordance with the SAES-W-015 standard, the following general requirements apply:

4.1: All strip lining must comply with the requirements of ASME SEC VIII (Division 1 or Division 2, as applicable) and the requirements specified in this standard. Additional specific requirements can be found in ASME SEC VIII D1, Part UCL, and ASME SEC VIII D2, Part 4, 6, and 7.

4.2: Acceptable welding processes for strip lining are Shielded Metal Arc Welding (SMAW), Gas Metal Arc Welding (GMAW) including the short-circuiting mode, and Gas Tungsten Arc Welding (GTAW). It is important to note that the short-circuiting mode of GMAW, which is prohibited for general vessel fabrication, is allowed for strip lining applications.

4.3: Strip lining is not suitable for certain applications, including those with maximum design temperatures above 427°C, applications requiring post-weld heat treatment after installation of the lining, and applications involving hydrogen service. The lining material should be selected based on the specific service conditions, such as corrosion resistance, service fluid, and operating conditions. By default, the lining material should be either 316L stainless steel or Monel unless an alternative material is specified in the Engineering Design and approved by CSD.

4.5.1: The minimum thickness of the lining material should be at least 2 mm for Monel and at least 3 mm for austenitic stainless steel.

These requirements ensure that the strip lining installation meets the necessary standards and is suitable for the intended service conditions.

Strip Lining Application

Lining Methods

In accordance with the SAES-W-015 standard, the following requirements pertain to the lining methods:

5.1: The lining can be attached to the component shell using either of the two acceptable methods:

a) Butt-welded method (“tiled method”): This method involves attaching individual strips to the component shell and to each adjacent strip using a minimum of three passes. Plug welded linings are not acceptable.

b) Lap method (“shingle method”): This method involves attaching each strip to either the component shell or the adjacent overlapped strip using single-pass fillet welds (multipass is also acceptable).

5.2: Butt-welded (“tiled”) linings should be attached as shown in Figure 1. The first two passes (Welds A and B) are fillet welds that connect each strip to the component shell. If these fillet welds do not overlap, an additional fill pass (Weld C) should be made between them. A final covering pass (Weld D) is made on top, completely covering the previous passes. The final covering pass should provide a low dilution weld, ensuring minimal mixing with the base metal. Proper chemical analysis requirements for the procedure qualification should be followed.

Commentary Note: It is essential that the final covering pass(es) completely cover the previous layers and have at least one complete layer between them and the base metal to achieve a low dilution weld deposit where it comes into contact with the service fluid. If concerns about potential corrosion problems due to weld dilution are significant, it is recommended to choose the lap welded method.

5.3: Lap-welded (“shingled”) linings are attached as shown in Figure 2. Single-pass fillet welds (multipass is also acceptable) are used to attach each strip to either the component shell (Weld 1) or the adjacent overlapped strip (Weld 2).

Commentary Note: Since only the top welds attaching one lining strip to the adjacent strip underneath are in contact with the service fluid, there are no requirements governing dilution with the base metal. A filler metal matching the lining material is used for this weld.

5.4: For Monel linings, all welding should use ENiCu-7/ERNiCu-7 consumables. For 316L linings, all welding should use E309MoL/ER309LMo consumables for all passes, or ENiCrFe-3/ERNiCr-3 for all passes (mixing of electrode types is not permitted). If nickel-based electrodes are used, their suitability for the operating conditions and service fluid should be evaluated.

These requirements ensure proper attachment and welding methods for the corrosion-resistant strip lining, taking into account the specific material and application considerations.

According to the SAES-W-015 standard, here are some additional specifications regarding the lining methods:

ENiCrMo-3/ERNiCrMo-3 can be used as acceptable substitutes for ENiCrFe-3/ERNiCr-3 in welding consumables.
For component shells, the orientation of the strips should be circumferential.
In vertical components using the lap method, the lap should be downward, meaning the upper strip overlaps the lower strip (self-draining configuration).
All welds should be continuous.
Heads should be lined using the same methods as required for the shells, with the orientation of the strips as shown in Figure 3.

Connections with a diameter less than 300 mm can be lined using a “one-piece” liner as depicted in Figure 4. A 50 mm wide lining ring should be used to bridge between the shell lining and the connection lining. The ring should be installed after the nozzle is welded to the component shell and both the shell and nozzle linings have been completed. For flanged connections, the strip lining inside the connection should be installed onto a weld overlay on the bore and flange face, as shown in Figure 4 and Standard Drawing AB-036367.
Connections with a diameter of 300 mm and larger should use strip lining.

Figure 4 – Lining Arrangement for Small Connections

Commentary Note: Nozzles may also be weld overlayed (refer to SAES-W-014) or clad as alternatives to strip lining. The use of solid alloy connections is prohibited by other vessel standards. These specifications provide guidelines for lining methods in different scenarios to ensure proper corrosion resistance and structural integrity.

FAQs About SAES-W-015 PDF Download

What does this standard specifically cover?

This standard covers the welding and testing requirements for installing a corrosion-resistant strip lining in process equipment as a field modification. It focuses on ensuring the proper welding and testing procedures for the installation of the lining.
What types of equipment does this standard apply to?

The application of this standard is primarily for pressure vessels, including heat exchangers. It provides specific guidelines for the installation of a corrosion-resistant strip lining in these types of process equipment.
How does this standard relate to SAES-W-010?

This standard is intended to be considered as a supplement to SAES-W-010, which is a general standard outlining welding requirements for pressure vessels and heat exchangers. SAES-W-010 provides the overall framework for welding practices, while this standard provides additional requirements specific to installing a corrosion-resistant strip lining.
Are there any additional requirements apart from ASME SEC VIII and ASME SEC IX?

Yes, the requirements specified in this standard are in addition to the requirements of ASME SEC VIII and ASME SEC IX. These additional requirements specifically address the welding and testing procedures for installing the corrosion-resistant strip lining in process equipment.
Are there any other relevant considerations?

While this standard provides specific guidelines for the welding and testing requirements, it’s important to note that additional instructions or specifications may be included in Scopes of Work, Drawings, or other Instructions or Specifications. These documents should be consulted for any additional requirements or instructions pertaining to the installation of the corrosion-resistant strip lining.

SAES-W-015 PDF – Strip Lining Application