... SCH10-XXS Material:Carbon Steel,Stainless Steel Flanges -ANSI B16.5 Welding Neck size 1/2" to 24" ASME B16. ... ,PN25,PN40/ Class A, B, C, D, EstandardASME B16.5, ASME B16.47, ASME B16.36,DIN 86341-2000, DIN2505materialCarbon ... ,ISO 14001 Environment Mangement System Certificate,OHSAS18001 Occupational Health & Safety Mangement System Certificate, acquired the license for manufacturing special pressure ...