Current national standards

gb/t10752-1995 Marine steel pipe to welding head

Flexible interface Cast iron pipes and fittings for gb/t12772-1999 drainage

GB/T 8803-2001 test method for hot oven of rigid polyvinyl chloride (PVC-u), chlorinated polyvinyl chloride (pvc-c), acrylonitrile-butadiene-Styrene ternary copolymer (ABS) and acrylonitrile-styrene-acrylate ternary copolymer (ASA) tube