Longrun proceed chemical test and physical test for all flanges per each heatment. Our stainless steel forged flange are also approved by some third party .

Test report overview:   

Chemical Test Report	Physical Test Report	Third Party Test Report(EN10204-3.2)
EN10204-3.1	Intergranular Corrosion(IGC)-ASTM A262-E	EN10204-3.2 by TUV
	Intergranular Cossosion(IGC)-ASTM A262-C	EN10204-3.2 by Lloyed
	Intergranular Corrosion(IGC)-ISO3651-2	EN10204-3.2 by Intertek
	ASTM E562