1.Material: the material of this flange can be made in ASTM(A105, A350-LF2, A182-F22, A182-F7, A182-F304, A182-F304L, A182-F347, A182-F316, A182-F321, A182-F321H, A182-F347H.), DIN, JIS
2.Standard: w…
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