What does the qualification certificate of stainless steel pipe fittings include?
1: Supplier Detail
2:Casting Number or Batch Number
3:Casting Drawing or Order Contract No
4:Material Grade, Melting Furnace Number; Heat treatment Furnace Number and Heat Treatment State
5:Manufacturing Date( Or serial Number)
6: Test Result
7: Other condition request on Contract
8:Signature and seal of quality inspection department
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