API 526:2002 pdf download

API 526:2002 pdf download.Flanged Steel Pressure Relief Valves.
1.3 DEFINITIONS
Pressure relief sake tenninology is defined in API Return mended Practice 520. Part L
1.4 RESPONSIBILITY
The purchaser is primarily responsible for the following:
a Selecting the type of pressure relief valve and the required pressure-temperature ratings.
b. Specifying materials that will satisfactorily resist ctwrosian from the process fluid and environmental conditions.
c. Selecting the minimum required orifice area based upon relieving conditions derived 1mm full knowledge of the pressure-relieving system and die requirements of the applicable codes and regulations.
d. Pius iding data fur siting and selection
The manufacturer is primarily responsible for the following:
a Designing and manufacturing pressure relief valves to sattsfy the requirements of this standard and the puruhaser’s specilication.
ft Publishing relieving capacities based upon certified test
c Advising die purchaser of any nonconformance to the purchaser’s specitication.
d, Fipial siting verification using the manufacturer’s actual orifice area and certified coefficient of discharge.
1.5 CONFUC’TlNG REQUIREMENTS
Whencver the iniorn,uion included on the purchasers specification sheet or purchase order conllicLs with the provisions of this standard, the purchaser’s specification sheet or purchase order shall gostrn Where conflicting requirements esist, the manufacturer shall call them to the attention of the purchaser
1.6 ORIFICE AREAS AND DESIGNATIONS
The standard effective orifice areas and the coorsponding letter designations are listed in Table I. These effective areas are valid only when used wills the sizing equations contained in API RP 520, Part I.
4.2 SET PRESSURE TEST
All pressure relief valves shall tie adjusted to the specified se pressure in accordance with the ASME Boiler and Ptra sure tssel Cock, the minufacturer’s standard practice as published. or as designated by the purchaser. All set pressure adjustments shall be scaled.
4.3 SEAT LEAKAGE TEST
All pressure relief salves shall be seat leakage tested in accordance with API Sid 527. or as agreed upon by the manufacturer and the puichaser.
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 Appcndix B. Pilot-operated pressure relief valves shall have an additional nameplate permanently attached to the pilot. The pilot nameplate shall he stamped with the mirnufacturer’s name. pilot type. set pressure. and serial number.
Each pressure relief salve shall be tagged with the purdasers valve number or other identilication as specified on the purchase order. [he data ma be stamped on the nameplate or on a separate cornsotm-rcsistant tag that is permanently attached to the sahe.
5.2 PREPARATiON FOR SHIPMENT
Each pressure relief salve shall be prepared for shipment as
a. After test and inspection, all exterior surfaces, except flange facings, shall be painted as agreed upon by the manufacturer and the puruhascr. CotTaaion-rcsistant materials need not be painted. Flange facings shall be coated with a suitable corrosion inhibitor.
Is. Threaded openings shall he plugged with suitable pmtective devices, Tempuracy plup should be nrahly distinguishable trom permanent metal plugs.
c. Inlet and outlet flanges shall be prntected to prevent darn. age from or entrance of foreign material during shipment.