This article is about Low-Temperature Steel Reducing Insert Fittings and technical specification based on international codes and standards of ASTM A 350/A 350M. Grade: LF2. Class: 1.
Low-Temperature Steel Reducing Insert Fittings | ASTM A 350/A 350M
| Scope Description | Low-temperature steel, forged, socket-welding, reducer insert pipe fittings. |
| Material Specification | ASTM A 350/A 350M. Grade: LF2. Class: 1. |
| Dimensional
Specification |
MSS SP-79. |
| Purchase Order | See purchase order for type of fitting, DN or NPS, pressure class, number of pieces, and delivery and shipping instructions. |
| Lengths | Not applicable. |
| Tolerances | MSS SP-79. |
| Drawings | Not required. |
| Calculations | Not required. |
| Chemical Composition | ASTM A 350/A 350M, Grade LF2. Also by ladle analysis the carbon content shall be 0.23% maximum and Supplementary Requirement S6 is required and CE shall be 0.45% maximum. |
| Mechanical Strength | ASTM A 350/A 350M, Grade LF2. The maximum tensile strength shall not be more than 635 N/mm2 (92 ksi). |
| Welding | Not allowed. |
| Heat Treatment | ASTM A 350/A 350M, Grade LF2. All fittings shall be normalized. |
| Inspection | ASTM A 350/A 350M. Inspection is not required unless specified in the purchase order or required by the certification for this specification. |
| Testing | ASTM A 350/A 350M, Grade LF2, Class 1. |
| Examination | ASTM A 350/A 350M. |
| Certification | Items DN25 (NPS 1) and smaller shall be provided with an EN 10204 Type 3.1 inspection certificate.
Certification for all other items shall be one of the following:
Company ‘ representative may be from any Inspection Body acceptable to Company or alternatively a person nominated by Company . The supplier shall contact Company ‘ Inspection Department to establish who may be Company ‘ representative when applicable. Also see General Piping Material Purchase Specification. |
| Marking | MSS SP-79.
Marking shall also include the Commodity Code. Also see General Piping Material Purchase Specification. |
| Protection | Fittings shall be delivered free from corrosion or oxidation. A protective coating of light oil or varnish corrosion inhibitor may be used. This inhibitor shall be easily removable, and the supplier shall state with his quotation the method for removal. |
| Color Coding | Not required. |
| Packing | Shipment and Packing Specification for Equipment and Materials. Suitable packing shall be provided to ensure that all items arrive at the contractual point of delivery in an undamaged condition. Refer to the purchase order for specific packing standards and instructions. |
| Special Requirements | None. |
| Application Notes | Low-temperature steel, socket-welding, reducer insert fittings to the PED. Pressure: MSS SP-79 as calculated for stated pipe. Temperature: -29° to +427°C (-20° to +800°F). |
Note: This engineering specification shall be used in conjunction with General Piping Material Purchase Specification.