RBE Pipe (OD 36''~300'', 4 meters long per section)

The production line adopts 6000 tons pre-bending, three-roller bending machine for forming. For the formed short pipe section, tack welding is firstly carried out by CO2 shielded arc welding, heating treatment before welding, and then internal straight welding, external straight welding, internal girth welding, and external girth welding are conducted with single wire, multi-layer and multi-pass welding. After completion of welding, the weld seam is heat preserved to reduce the weld residual stress and increase the property of stress corrosion resistance of metal. The characteristic of the production line is the wall thickness and diameter of product is large, which can be widely used for structural pipe, such as steel structural bridge, high-voltage transmission tower, sea and land wind tower, offshore platform equipment and super-long pipe piles etc.

Process: LSAW – RB (RBE)

Usage: Used for low pressure liquid delivery, such as water, gas, and oil.

Standard: ASTM 53, EN10217, DIN 2458. IS 3589, GB/T3091, GB/T9711

Out Diameter: 355.6mm – 5080mm

Wall Thickness: 6.0 – 195mm

MAX length of a singleunit: 4m

Length: 3 – 75m

Steel Grade:

ASTM A53: GR A, GR B, GR C

EN: S275, S275JR, S355JRH, S355J2H

GB: Q195, Q215, Q235, Q345, L175, L210, L245, L320, L360- L555

Surface: Fusion Bond Epoxy Coating, Coal Tar Epoxy, 3PE, Vanish Coating, Bitumen Coating, Black Oil Coating As Per Customer’s Requirement

Test: Chemical Component Analysis, Mechanical Properties (Ultimate Tensile Strength, Yield Strength, Elongation), Technical Properties (Flattening Test, Bending Test, Blow Test, Impact Test), Exterior Size Inspection, Hydrostatic Test, X-ray Test.

Mill Test Certificate: EN 10204/3.1B

Process Flow Chart

WT (mm) Steel：Q345B/S355/X52

WT (mm) Steel：Q460/S460/X70

WT (mm) Steel：Q690/X100