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        Yangquan valve Limited by Share Ltd

        Consultative:400-003-1469

        Electricity: (0353) 2591440 (0353) 2591441

        (0353) 2590751 (0353) 2590307

        Address: No. 366 new road, Yangquan City, Shanxi Province

        True: (0353) 25914692591781

        Mail code:045000

        E-mail:yqfm@sina.com



        Your current location :Home>Quality>Product testing
        Quality

        Inspection of finished product

        1. Scope

        This procedure applies to the final inspection of the valve products, including finished product testing and delivery inspection

        1. Quoted standard

        QB/YF.Z.02.13-1998 Inspection & Test Control Procedures

        QB/YF.Z.02.15-1998 Inspection & Test  Status Identification procedures

        QB/YF.Z.02.16-1998 Nonconforming Product Control Procedure

        1. Obligation

        Fitter inspector of Quality inspection department is responsible for the finished product inspection

        Factory inspector of quality inspection department is responsible for delivery inspection

        1. Inspection regulations

        Finished product inspection

        Inspection standard

        4.1.1.1 Inspect according to the product assembly drawing specified " performance standards" and pressure test standard, see table 1 of each series of pressure test standards

        Table 1 Each series of pressure test standards


        Series variety name

        Specification range

        Pressure test standards

        All kinds of butterfly valve

        Various spec

        GB/T13927 water pressure test D level 0.06×DN (cm3/min)

        Cast steel gate valve

        Various spec

        Z42 series iron mouth valve

        Various spec

        Cast iron gate valve (copper mouth, iron mouth)

        ≤350

        City gas valve

        Various spec

        GB/T13927 gas pressure test (0.18×DNcm3/min)

        Cast iron gate valve ()

        ≥400

        GB/T13927-2008

        Check valve

        Various spec

        Flap valve

        ≤24

        API598

        Nuclear power valve


        According to contract requirement

        4.1.1.2 The maximum allowable leakage of various specifications of the valve pressure test standards: see table2

        Table 2 The maximum allowable leakage of various specifications of the valve pressure test standards (Rigid metal seal valve)



        GB13927
        (4981)
        water pressure test D level
        cm3/min

        GB13927
        (4981)
        gas pressure test C level
        cm3/min

        API
        gas pressure test
        cm3/min

        Nuclear power valve standard
        water pressure test
        cm3/min

        100

        0.6

        18

        0.75

        0.33

        125

        0.75

        22.5

        0.75

        /

        150

        0.9

        27

        0.75

        /

        200

        1.2

        36

        1.25

        0.67

        250

        1.5

        45

        1.25

        /

        300

        1.8

        54

        1.25

        /

        350

        2.1

        63

        1.75

        /

        400

        2.4

        72

        1.75

        2.6

        450

        2.7

        81

        1.75

        /

        500

        3.0

        90

        1.75

        /

        600

        3.6

        108

        1.75

        /

        700

        4.2

        126

        /

        /

        800

        4.8

        144

        /

        5.30

        900

        5.4

        162

        /

        /

        1000

        6

        180

        /

        6.66

        1200

        7.2

        216

        /

        /

        1400

        8.4

        252

        /

        /

        1600

        9.6

        288

        /

        /

        1800

        10.8

        324

        /

        /

        2000

        12.0

        360

        /

        /

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