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Large diameter straight seam double-sided submerged arc welding butt joint steel pipe (RBE method)

Detailflow chartProcess videotechnical parameter

The company has two sets of SAWL (RBE method) large-diameter longitudinal double-sided submerged arc welding butt-joining steel pipe units, which can produce 300,000 tons of large-diameter longitudinal double-sided submerged arc welding butt-joining steel pipes every year. The products are mainly used in ore slurry transportation, urban tap water, sewage treatment, heating network renovation and other projects. At the same time, they are also widely used in steel pipe piles, bridges, and steel structures.


Diameter: Ф914~Ф3251mm.


Wall thickness: 9.53~40mm.


Steel grade:


⑴Pipeline steel: L245/B~L555/X80;


⑵Carbon steel: Q235~Q355, C60, C65, etc.


Executive standard: GB/T 9711-2017, API SPEC 5L (46 edition), GB/T 3091-2015, SY/T 5037-2018 and other domestic and foreign standards of similar products and other higher standards.

Product main parameters (API SPEC 5L (46 version)):


Outer diameter deviation:


When the outer diameter of the steel pipe is 914≤D≤1422mm:


The outer diameter deviation within 100mm of the pipe end: ±1.6mm; the outer diameter deviation of the pipe body: ±0.005D, the maximum is ±4.0mm.


When the outer diameter of the steel pipe is D>1422mm, it is agreed.


Ovality deviation:


When the outer diameter of the steel pipe is 914≤D≤1422mm:


Ovality deviation within 100mm of tube end: 0.01D, maximum 13mm; tube ellipticity deviation: 0.015D, maximum 15mm.


When the outer diameter of the steel pipe is D>1422mm, it is agreed.


Wall thickness deviation:


When the wall thickness is t>5.0mm:


Wall thickness deviation: ±0.1t, the maximum is ±1.5mm.


Straightness deviation:


The total deviation of the total length of the steel pipe relative to the straight line should be ≤0.2% of the length of the steel pipe, and the local deviation of the steel pipe within the 1.5m length of each pipe end relative to the straight line should be ≤3.2mm.


Length range:


Length: 3~12mm.


If customers have higher requirements for quality, they can be negotiated.


Product nominal outer diameter and nominal wall thickness range table:


nominal

nominal W.T   mm

mm

in

9.53

12.7

14.3

15.9

19.1

22.2

25.4

28.6

31.8

34.9

38.1

40

914

36













920














965

38













1016

40













1020














1067

42













1219

44













1220

46













1321

48













1420














1422

56













1524

60













1626

64













1727

68













1820














1829

72













1930

76













2032

80













2134

84













2438

96













2540

100













2642

104













2743

108













2850














2950














3048

120













3150

124













3251

128