This article is about Low-Temperature Steel Swage Fittings and technical specification based on international codes and standards of A 420, Grade WPL6.
Low-Temperature Steel Swage Fittings ASTM A 420, Grade WPL6
| Scope Description | Low-temperature steel, plain, beveled or threaded end, seamless, swage nipple pipe fittings. |
| Dimensional Specification | MSS SP-95. Threads shall be NPT according to ASME B1.20.1 unless otherwise stated on the purchase order as ISO or BSP. When specified as ISO or BSP, the threads shall be tapered according to ISO 7/1 or BS 21 (BSP). |
| Purchase Order | See purchase order for type of fitting, DN or NPS, schedule or weight class or wall thickness, number of pieces, and delivery and shipping instructions. |
| Material Specification | ASTM A 420/A 420M. Grade: WPL6. |
| Lengths | MSS SP-95. |
| Tolerances | MSS SP-95. |
| Drawings | Not required. |
| Calculations | Not required. |
| Chemical Composition | ASTM A 420/A 420M, Grade WPL6.
Also by ladle analysis the carbon content shall be 0.23% maximum and the carbon equivalent as defined by (CE) = C+Mn/6+(Cr + Mo + V)/6+ (Cu + Ni)/15 shall be 0.45% maximum. |
| Welding | Not allowed. |
| Heat Treatment | ASTM A 420/A 420M, Grade WPL6. All fittings shall be normalized. |
| Inspection | MSS SP-95. Inspection is not required unless specified in the purchase order or required by the certification for this specification. |
| Examination | MSS SP-95. |
| Marking | MSS SP-95. Marking shall also include the CAD 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. |
| 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:
• EN 10204 Type 3.2 inspection certificate also certified by a representative. • EN 10204 Type 3.1 inspection certificate from material manufacturers that have quality assurance systems certified by a competent body established in the European Community. Company representative may be from any Inspection Body acceptable to company or alternatively a person nominated. The supplier shall contact Inspection Department to establish who may be representative when applicable. The certification shall include a copy of the original material manufacturer’s inspection certificate or report, which shall also comply with the above. |
| 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. |