| 20#无缝钢管的制造工艺 1.热轧(挤压无缝钢管):圆管坯→加热→穿孔→三辊斜轧、连轧或挤压→脱管→定径(或减径)→冷却→矫直→水压试验(或探伤)→标记→入库
 
 
	     2.冷拔(轧)无缝钢管:圆管坯→加热→穿孔→打头→退火→酸洗→涂油(镀铜)→多道次冷拔(冷轧)→坯管→热处理→矫直→水压试验(探伤)→标记→入库
 
	
 
	20#无缝钢管42×3.5-4-5-6-7-8-9-1020#无缝钢管45×3.5-4-5-6-7-8-9
 20#无缝钢管48×3.5-4-5-6-7-8-9-10
 20#无缝钢管51×3.5-4-5-6-7-8-9-10
 20#无缝钢管56×3.5-4-5-6-7-8-9-10
 20#无缝钢管57×3.5-5-6-7-8-9-10-12
 20#无缝钢管60×3.5-4.5-5-6-7-8-9-12-14
 20#无缝钢管63×3.5-4.5-5-6-7-8-9-10-12-14
 20#无缝钢管68×4-4.5-5-6-7-8-9-10-12-14-16
 20#无缝钢管70×4-4.5-5-6-7-8-9-10-12-15-16
 20#无缝钢管73×4-4.5-5-6-7-8-9-10-12-15
 
 
	
 
	20#无缝钢管销售公司网址:www.wfgg126.com
 |