... thickness:0.4-13mm Length:3-12m Standard: BS, JIS, GB, DIN, ASTMStandard: ASTM A106-2006Grade: 10#-45#, A53-A369Grade: 20 ... 9001CERTIFICATE. BUTT WELDED FITTING: Production acc. to the standard of GB /ASTM / ASME / DIN / JISASTM B 16.9 /16.11 B ...