GB 9948 Carbon Steel Seamless Steel Pipe For Petroleum Cracking
GB 8713 Seamless Steel Tubes For Hydraulic And Pneumatic Cylinders
GB 6479 Alloy Seamless Steel Pipe For High Pressure Fertilizer Equipment
ASTM A53 Carbon Steel Seamless Steel Tubes For Air Conditioning Refrigeration
GB/T 3094 Special Shaped Seamless Steel Pipe for Industrial Machinery
YB/T 4146 High Carbon Chromium Bearing Steel Seamless Steel Pipe
GB/T 5312 Q235 Carbon Manganese Steel Seamless Steel Tubes for Ships
GB3087 Q235 Cold Drawn Seamless Steel Tubes For Low And Medium Pressure Boilers
GB 5310 Hot Rolled Seamless Steel Tubes And Pipes For High Pressure Boilers
ASTM A270 304 316 Welded Stainless Steel Tubes For The Food Hygiene Grade
ASTM A178 Welded Carbon Steel Welded Steel Pipes For Boiler And Superheater
ASTM A178 ERW Welded Steel Pipes Carbon Steel Welded Tubes
GB/T 8163 Carbon Steel Tube Seamless Steel Pipe For Conveying Fluid
GB/T8162 Seamless Carbon Steel Tube For Mechanical Structure
GB/T 3639 Seamless Steel Tubes For Precision Application
PTO Lemon Triangular Carbon Tubes Seamless Steel Pipe
GB/T 5312 Q235 Hot Rolled Carbon Seamless Steel Tubes
ASTM A513 Welded Carbon Steel Tubes
ASTM A178 ERW Electric Resistance Welded Carbon Steel Welded Steel Pipes
ASTM A53 Hot-Dipped Carbon Steel Seamless Steel Tubes
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