SSAW Steel Pipe (HSAW Pipe) OD 16''~125'', 30mm max. thickness,  50 meters per section

Rear swing spiral welded pipe production line introduction

The working principle of the rear swing spiral welded pipe production line is to open and level the steel coil through the unit equipment, and then feed it into the forming machine at certain angles. Using the principle of the three roll coiling machine, supplemented by certain angles, continuous circular pipes are formed. Continuous spiral welds are welded using a submerged arc welding machine. The process flow includes steps 12 such as coiling, uncoiling, leveling, shear welding, milling machine, feeding machine, flying welding vehicle, delivery machine, pre bending, and guide plate.

Characteristics and advantages

Efficient continuous production:

The production line adopts a continuous production method, with the main machine continuously producing without stopping, resulting in a high production efficiency.

High quality products:

The welded pipes produced are of good quality, with 2 fewer replacement pipes.

Wide applicability:

Suitable for the production of steel pipes of different specifications, including API standard and national standard models, respectively used for long-distance oil and gas transportation, short distance natural gas transportation, and urban pipeline construction.

Advanced technology:

Adopting roller surface forming three roll external control, rear swing combination curve roller forming and other processes, stable forming, high degree of automation, and easy maintenance.

Process: Spiral Submerged- Arc Welded Steel Pipe

Usage: Used for low pressure liquid transportation, such as water, gas, and oil; construction and piping

Standard: ASTM A252, EN10217-1,2,5, EN10219-1, EN 10210, BS, JIS, IS,

Certificate: EN10217, EN10219, API 5L PSL1/ PSL2, API2B

Out Diameter: 219.1 mm – 3200mm (8″-126″)

Wall Thickness: 4mm – 25.4mm

Length: 3 – 70 M

Steel Grade: ASTM A252 GR 1, GR 2, GR 3

BS 4360: Grade 43, Grade 50

EN: S275JR, S275J0H, S275J2H, S355JRH, S355J0H, S355J2H

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 (Tensile Strength, Yield Strength, Elongation), Metallographic Test, Technical Properties (Bending Test, Charp-V Impact Test, Hydrostatic Test, X-ray Test, Hydrostatic 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