The pipe fittings are made in accordance with following standards:(1) American standard: ASTM A234, WPB, ANSI B16.9(2) Japanese standard: JIS B2311, JIS B2312(3) German standard: DIN2605Material: carb
All the flanges are made in accordance with following standard:American Standard: ASTM A105, ASTM A182, ANSI B16.5Japanese Standard: JIS B2220British Standard: BS4504, BS10German Standard: DINItalian