API 526:2002 pdf download

API 526:2002 pdf download.Flanged Steel Pressure Relief Valves.
3 Material
3.1 GENERAL
Materials generally used for construction are covered in this section. For special corrosion problems and applications beyond the pressure-temperature limits of this standard, construction materials shall be those agreed upon by the manufacturer and the purchaser.
3.2 SPRING-LOADED PRESSURE RELIEF VALVES
The body. bonnet, and spring materials shall be in accordance with Tables 2 — 15 for the required temperature range. The body and bonnet may be of different materials but must mcci the minimum pressure-temperature requirement. 11w body and bonnet materials shall be equivalent to or better than the following types and grades:
4.2 SET PRESSURE TEST
All pressure relief valves shall be adjusted to the specified set pressure in accordance with the ASME Boiler and Pressure Vessel Code, the manufacturer’s standard practice as published, or as designated by the purchaser. All set pressure adjustments shall be sealed.
4.3 SEAT LEAKAGE TEST
All pressure relief valves shall be seat leakage tested in accordance with API SW 527. or as agreed upon by the manuflicturer 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 specified 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 manufacturer’s name, pilot type. set pressure. and serial number.
Each pressure relief valve shall be tagged with the purchaser’s valve number or other identification as specified 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:
a. After test and inspection, all exterior surfaces, except flange facings. shall be painted as agreed upon by the manufacturer and the purchaser. Corrosion-resistant materials need not be painted. Flange facings shall be coated with a suitable corrosion inhibitor.
h. Threaded openings shall be plugged with suitable protective devices. Temporary plugs should be readily distinguishable from permanent metal plugs.