20#無縫鋼管為低碳鋼管,碳鋼一般分為低碳鋼、中碳鋼和高碳鋼三種,其中45#鋼為中碳鋼,低于45#即為低碳鋼,高于45#即為高碳鋼,無縫鋼管如沒有特殊要求,一般均采用20#無縫鋼管。
60×3.5-4.5-5-6-7-8-9-12-14
|
219×30-40-45-50-55
|
630×10-20-30-40-55
|
63×3.5-4.5-5-6-7-8-9-10-12-14
|
219×55-58-60-65-70
|
640×12-25-32-40-50-65
|
68×4-4.5-5-6-7-8-9-10-12-14-16
|
245×8-10-14-17-20-22
|
650×15-20-30-40-50-60-65
|
70×4-4.5-5-6-7-8-9-10-12-15-16
|
245×25-28-30-34-40
|
680×20-25-35-45-65
|
73×4-4.5-5-6-7-8-9-10-12-15
|
273×7-9-12-15-18-20-25
|
710×10-20-30-45-50-65
|
76×4-4.5-5-6-7-8-9-10-12-14
|
273×30-35-38-40-45-50
|
720×10-20-30-45-50-65
|