... seamless, forged elbow 2. pipe fitting 3. carbon, stainless steel, alloy steel 4. ASME, DIN, JIS, GB WeldSeamless Nominal SizeDN250-DN1800DN15- ... DIN28011 SGPJIS B2313 ENEN10253-1, EN10253-2 Material ASTMCarbon steel: A234 WPB Stainless steel: A403 WP304, A403 WP304L, A403 WP316, A403 ... WP316L, A403 WP321 Alloy steel: A234 WP12, A234 WP11, A234 WP22, A234 WP5, A420 ...