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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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