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· ASTM A53 Spiral Steel Pipe [2017-05-24 HITS：3]
ASTM A53 Spiral Steel Pipe [READ]

· ASTM Q213 Oil pipe [2017-05-23 HITS：3]
ASTM Q213 Oil pipe [READ]

· ASTM A36 Welded steel pipe [2017-05-22 HITS：1]
ASTM A36 Welded steel pipe [READ]

· ASTM A105 Seamless steel Pipe [2017-05-19 HITS：3]
ASTM A105 Seamless steel Pipe [READ]

· ASTM A312 Stainless Steel Spiral Pipe [2017-05-18 HITS：1]
ASTM A312 Stainless Steel Spiral Pipe [READ]

· ASTM A53 Oil Pipeline [2017-05-17 HITS：0]
ASTM A53 Oil Pipeline [READ]