Product Name Model No.
The Mechanical Performance of Main Parts Material
PN DN mm Yield Tensile Reduction
Elongation Impact
Temperature ≤ ℃ Fluid water, oil, steam, etc. Part
Material
Strength Strength of area
valve HBS
name δ
Serial No. Quantity units No σb σs ψ ak HBR
.
(%) J
MPa MPa (%)
Test items Requirement Result Body
Main parts As per GB12228-12230 Satisfactory Disc
Thread As per drawings Satisfactory
Bonnet
Connecting size As per GB12221 Satisfactory
Stem
Strength test 1.5PN (Fluid: water) Satisfactory
Seat
Sealing Test 0.6MPa (air) /1.1PN (water) Satisfactory
As per the rules of visual
Visual inspection The Chemic Components of Main Parts Material
inspection Satisfactory
Part
The product is satisfied and allowed to leave factory as Material No.
name C Si Mn S P Cr
Ni
per drawings & GB12228, GB/T13927.
Body
Disc
Luofu ValveGroup Zhejiang Zhonggong Valve Co., Ltd Bonnet
Stem
Quality Department
Seat
Inspector：
Notes
Date: