33 pilot operated pressure relief valves the body

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Unformatted text preview: e CF8M ASME SA 494 Grade M35-1 ASME SA 351 Grade CN7M Material for the internal parts of the valve shall be in accordance with the manufacturerÕs standards for the temperature and service or as indicated on the purchaserÕs speciÞcation sheet. 3.3 PILOT-OPERATED PRESSURE RELIEF VALVES The body material shall be in accordance with Tables 16 Ð 29 for the required temperature range. The body material shall be equivalent to or better than the following types and grades: Carbon steel Austenitic stainless steel Nickel/Copper Alloy Alloy 20 ASME SA 216, Grade WCB ASME SA 351, Grade CF8M ASME SA 494, Grade M35-1 ASME SA 351, Grade CN7M Material for the pilot and internal parts of the valve shall be in accordance with the manufacturerÕs standards for the temperature and service or as indicated on the purchaserÕs speciÞcation sheet. 4 Inspection and Shop Tests 4.1 INSPECTION The purchaser reserves the right to witness the shop tests and inspect the valves in the manufacturerÕs plant to the extent speciÞed on the purchase order. 4.3 SEAT LEAKAGE TEST All pressure relief valves shall be seat leakage tested in accordance with API Std 527, or as agreed upon by the manufacturer and the purchaser. 5 Identification and Preparation for Shipment 5.1 IDENTIFICATION Each pressure relief valve shall have a corrosion-resistant nameplate permanently attached to the body or bonnet. This nameplate shall be stamped with the data speciÞed in Appendix B. Pilot-operated pressure relief valves shall have an additional nameplate permanently attached to the pilot. The pilot nameplate shall be stamped with the manufacturerÕs name, pilot type, set pressure, and serial number. Each pressure relief valve shall be tagged with the purchaserÕs valve number or other identiÞcation as speciÞed on the purchase order. The data may be stamped on the nameplate or on a separate corrosion-resistant tag that is permanently attached to the valve. 5.2 PREPARATION FOR SHIPMENT Each pressure relief valve shall be prepared for shipment as follows...
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