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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>Process control
        Quality

        1 Range

        This standard applies to the process of valve products testing, including cast iron, bronze, machining and milling drill, manual device and testing of process quality control point.

        2 Standard

        QB/YF.Z.02.13-1998 inspect and test control process
        QB/YF.Z.02.15-1998 inspect and test status indicator process
        QB/YF.Z.02.16-1998 defective product control process

        3 Responsibility

        Quanlity control deparment for inspecting  Iron castings, bronze pieces

        Machine tooling inspector in charge of the inspection of Machine tooling,milling drilling operation,Manual device and procedure quality control point.

        4 Ispection procedure

        4.1Inspection for Iron casting;
        4.1.1standard
        According to regulation of classification for drawing outline and casting quality
        attachment:regulation of classification for casting quality
        4.1.2Key point of ispection
        Body,disc,cover of pressure parts
        4.1.3Inspection mode
        Inspection for the first,Medium,final item from each bactch of products.

        4.1.4Inspection record
        Make the casting test record form(body,disc,cover)

        4.2Bronze pieces inspection
        4.2.1standard
        Figure of valve plate seals
        4.2.2Inspeciton project
        ID&OD of seals for body and disc
        4.2.3Inspection mode
        Inspection for the first,Medium,final item from each bactch of products.
        4.2.4 Inspection record
        Fill the inspection record form of Bronze pieces

        4.3Inspection of machine tools milling&drilling
        4.3.1Test based on drawing outline of product
        4.3.2scope of inspection

        Part name of inspection&control for each series:see scheduleI,parts inspection control site:see schedule II

        I:part name of inspection&control for each series


        Item

        pcs

        Part name

        Copper port valve

        7

        body、cover、disc、stem、stem nut、copper ring of the valve body、copper ring of the valve disc

        taphole valve

        5

        Valve body、cover、disc、stem

        Gas valve

        5

        Valve body、cover、disc、stem、stem nut

        Butterfuly valve

        5

        Valve body、disc、platen、stem、seat(copper ring of the valve body)

        II:parts inspection control site:see schedule


        Item

        No

        Part name

        Test tool

        Valve body

        1
        2
        3
        4
        5

        The length of the structure of the two flanges
        About dovetail shape and size precision
        File width of two sealing surfaces after finishing turning
        Roughness of two sealing surface
        Through flange center distance from the chord

        The caliper or box feet
        Templates and caliper
        calipers
        Roughness gauge block
        caliper

        Valve disc

        1
        2
        3

        The rabbet size and dovetail shape
        Total thickness after finishing turning
        Roughness of sealed surface after finishing turning

        Templates and caliper
        Caliper
        Roughness Gauge block

        copper ring of the valve body

        1

        Rabbet size and dovetail shape

        Caliper and templates

        copper ring of the valve disc

        1

        Rabbet size and dovetail shape

        Caliper and templates

        Valve cover

        1

        Fill hole size

        The smooth plug or caliper

        Valve stem

        1
        2
        3

        Out diameter size
        T type roughness and size of the thread
        undercut diameter size with two arcs

        Micrometer
        Roughness block gauge,T-thread ring or nut

        The caliper with half compasses

        Valve nut

        1

        T type roughness and size of the thread

        Roughness block gauge,T-thread plug gauge

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