JCOE Pipe

JCOE is straight seam double-sided submerged arc welded pipe, LSAW steel pipe can be divided into high-frequency LSAW steel pipe and submerged arc welded LSAW JCOE steel pipe according to the production process. Submerged arc welded straight seam steel pipe according to its different molding methods are divided into UOE, RBE, JCOE, LSAW steel pipe, etc. JCOE steel pipe production process is simple, high production efficiency, low cost, the development of faster

JCOE is one of the molding methods of LSAW steel pipe and one of the equipment. GB/T3091-2008, GB/T9711.1-2008 are generally used in China, and the international standard is API-5L.JCOE steel pipe is mainly based on double-sided submerged arc welding production process, and the products are bended, seamed, internally welded, externally welded, straightened, and flattened in many processes to meet the requirements of the relevant standards.

JCOE steel pipe plays an important role in large-scale pipeline projects, water and gas transmission projects, urban pipeline network construction, steel structure construction, bridge piling, municipal construction and urban construction.

Weight formula: [(O.D.-Wall Thickness)*Wall Thickness]*0.02466=kg/m (weight per meter).

Commonly used materials are: Q235A, Q235B, 16Mn, 20#, Q345, L245, L290, X42, X46, X70, X80, 0Cr13, 1Cr17, 00Cr19Ni11, 1Cr18Ni9, 0Cr18Ni11Nb and so on.

The internal and external surfaces of JCOE LSAW steel pipe shall be smooth, and folding, cracks, delamination, lap welding, arc breaking, burn-through and other depths exceeding the lower deviation of the wall thickness are not allowed, and other localized defects with depths not exceeding the lower deviation of the wall thickness are allowed to exist.

Advantages of JCOE steel pipe straight seam double-sided submerged arc welded pipe:

1. It is fully automated;

2. It is welded under the submerged arc, so it has stronger heat exchange and protection properties, and the quality of the welded product is higher;

3. In the submerged arc automatic welding in the arc buried under the welding flux, so it can be used in high current, welding efficiency is higher.

This pipe in the factory first prefabricated into a section, and then get the site, welding in the field, this pipe in the factory to produce the welding process is the use of submerged arc welding, submerged arc welding has been developed into a double-wire submerged arc welding, as well as multi-wire submerged arc welding, the efficiency of the further improvement.