20G锅炉管执行标准 GB3087无缝钢管377*8每米价格
20×2.5-3-5
|
121×4.5-5-6-7-8-10-12-14-16-20
|
377×8-12-15-20-24-28
|
24×2.5-3-4-5-6
|
127×4.5-5-6-7-8-10-12-14-16-20
|
377×30-37-40-45-50
|
25×2.5-3-4-5-6
|
133×4.5-6-8-12-14-16-18-20-25-30
|
402×10-15-20━25-30-35
|
28×3-3.5-4-5-6
|
140×5-6-7-8-9-10-12━14-16-20-22
|
406×10-20━25-28-35-40
|
20G高压锅炉管理论重量的计算方法:(外径-壁厚)*壁厚*0.02466无锡豪鑫天钢铁贸易有限公司销售电话051088264800 051088260900 15261667999 13376216888
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