Hot rolled oil/precision alloy seamless steel pipe
Hot rolling → heating → piercing → three roller helical rolling, tandem rolling or extrusion → tube knockout → sizing or tube diameter reduction → cooling → semi-finished hot rolled seamless pipe → straightening → water pressure test → labeling → warehousing.
1.Adopt solid tube blank as the raw material and then remove the defects on the tube blank surface
2.Cut the tube blank into desired length and then mark with the center at the pipe end which will be pierced
3.Deliver the tube blank to the heating furnace and use piercing machine to create a hole along with the length direction of the tube blank(a half finished hot rolled pipe)
4. Roll the tubular billet using an automatic plug mill, uniform the wall thickness of semi-finished hot rolled seamless steel pipes, and fix the diameter of the seamless tube using a sizing mill.
Hot rolled seamless steel pipe
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Pipe Size |
1/2"—12" (DN15-600) hot rolled seamless steel pipe |
|
Wall Thickness |
SCH10,SCH20,SCH30,STD,SCH40,SCH60,XS,SCH80,SCH100,SCH120,SCH140,SCH160,XXS, DIN, JIS standard thickness |
|
Length |
Fixed: 3.0 , 5.8 , 5.85 , 5.9 , 6.0 ,11.8 , 12.0m. Random length: 5-12m |
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Standard |
ASTM A53, A106, API 5L, ASME B36.10M-1996 DIN1626, DIN1629, DIN17175, DIN 2448 JIS G3452,JIS G3454,JIS G3455,JIS G3456,JIS G3457,JIS G3461 |
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Material |
Q235, 20#, Q345 A53B, A106B, API 5L B,X42,X46,X52,X60, X65 ST37.0,ST35.8,St37.2,St35.4/8,St42,St45,St52,St52.4 STP G38,STP G42,STPT42,STB42,STS42,STPT49,STS49 |
