Electric Resistance Welded Pipes

ERW pipes are the abbreviated form of the Electrical Resistance Welded Pipes. The demand for these pipes has risen exponentially in the recent years to a huge extent. They are used in a diversified range of application in the railings, gravity flow, conveyors and several other mechanical and piping systems.

Manufacturing Process of the Electrical Resistance Welding Pipes:
These electrically resistant pipes are manufactured from the hot rolled coils or the seam plates. These rolled coils are levelled and processed by the shearing force and the coil ends are then welded by electrical resistance welding method for reducing the losses and maintaining the continuity. The continuity of the production according to the various diameters is gradually and continuously maintained in the welding stands. After the pipes are produced, several type tests are carried out to verify the mechanical, the chemical and the physical properties of the pipes thoroughly. Once the tests are completed successfully, the Electrical Resistance Welding pipes are manufactured.

Classification of the Electrical Resistance Welding Pipes:
These pipes are generally classified into two categories according to the general forms of the pipes: the longitudinal Pipes and the Spiral Pipes. While in accordance to the applications of the pipes, they are widely classified into several categories. And they are
1. Galvanized pipes with zinc coating on the surface
2. Blow oxygen pipes used for blowing oxygen especially for the manufacturing of the pipes of small diameters.
3. Electrical welding pipes generally used for conduit electrical wiring.
4. Welding thin walled tube used for making toys, furniture etc.

Features of Electrical Resistance Welding Pipes:
The ERW pipes are of low grained, high performance, high deformability, high tolerance in their dimensions, high quality, high strength, wide applications, huge longevity and superior finishing with corrosion proof coating on the surface. They are known for their excellence in their field of working and strict maintenance of the high quality standards and specifications. These pipes are available in various shapes and sizes. There are several factors that have contributed to the popularity of these pipes over the others. And these are their various physical properties, their quite an affordable cost and many others.

Applications of Electrical Resistance Welding Pipes:
These pipes have a huge round of applications in the various fields of the industries. They are used in the engineering fields, agricultural fields etc. They are also used for fencing, line purposes of various pumps and many more. They are used to manufacture the various joints like the tees, elbows, reducers etc. in the various fittings. Also, these pipes are used for transportation of various flammable and inflammable liquids and gases for over miles and miles. They are widely used in the industrial world. This gain in popularity has resulted in the floating of the various tenders in the market through several sources. Some of them are direct from the public and the private sectors and others from the various indirect sources.. And thus these ERW pipes have provided a profitable business to the various business houses all across the world to a huge extent.

ASTM A53 ERW pipes

ASTM A53 pipe is one of low Pressure Fluid Transportation Pipe use for transportation for water, coal gas, air, oil and the steam for heating which are generally low pressure fluid.

We are manufacturer of ASTM A53 ERW pipes and supply high quality ASTM A53 ERW pipes in both large and small quantities worldwide &
offer you the best prices in the market.
We have a team of experienced professionals with years of experience in manufacturing.

ASTM A53 ERW Pipes Specification

Grade:
A53,API 5L GR.B,ST35.8,ST37,ST42,ST52,E235,E355,S235JRH,S275JR, S355J2H,S355JR

Type: Electric Resistance Welded(ERW)

Length: 6M-13M

Outer Diameter: 1/2”(21.3mm) to 24”(610mm)

Specification: 21.3mm-610mm*2mm-30mm

Technique: Welded

Thickness: SCH10(2mm) to XXS(30mm)

Surface Treatment: Normally bare or black vanish, FBE/2PE/3PE Coated.

If need, all the pipes can be covered in waterproof wrapping.

Materials and Manufacture

The steel for both seamless and welded pipe shall be made by one or more of the following processes: open-hearth, electric furnace, or basic-oxygen. The weld seam of electric-resistance welded pipe in Grade B shall be heat treated after welding.

Applications: heat exchangers, condensers, heat transfer equipment and similar pipes.

Note:

DN — Nominal Diameter

NPS —Nominal Pipe Size

Keywords:

black steel pipe, seamless steel pipe, steel pipe, welded steel pipe, zinc coated steel pipe, Black steel pipe–specifications, Seamless steel pipe–specifications, Welded steel pipe–specifications, Zinc-coated steel pipe–specifications

Packing: plastic pipe cap, plastic bag and steel strips bundled

Applications: petroleum, chemical, power, gas, metallurgy, shipbuilding, construction and more

• Dimensions and Weights of ASTM A53 Pipes size 1/8 – 1½ inch
• Dimensions and Weights of ASTM A53 Pipes size 2 – 3½
• Dimensions and Weights of ASTM A53 Pipes size 4-6 inch
• Dimensions and Weights of ASTM A53 Pipes size 8-12inch
• Dimensions and Weights of ASTM A53 Pipes size 14-18inch
• Dimensions and Weights of ASTM A53 Pipes size 20 – 26

Large diameter pipes

We are manufacturer of Large diameter pipes and supply high quality Large diameter pipes in both large and small quantities worldwide & offer you the best prices in the market.
We have a team of experienced professionals with years of experience in manufacturing.

Large diameter pipes (Carbon Pipes) Specification

Large diameter, mill certified API linepipe from 323.9 mm outside diameter through to 1220 mm outside diameter in varying wall thicknesses. All stock to a minimum of 350 MPA physical yield stengths.

High Quality S.A.W Spiralweld Pipes

600mm – 3000mm Diameter.

Product Type: ASTM A106/A53 GR.B

Product Name: 14 inch LSAW Large diameter welded carbon steel pipe

14 inch LSAW Large diameter welded carbon steel pipes

size: 14 inch, DN350, 355.8mm LSAW Large diameter welded carbon steel pipes

Outer diameter: ASTM 355.8mm, DIN 355.6mm, JIS 355.6mm 14 inch steel pipe

Material: ASTM A106 GR.B, ASTM A53 GR.B, 20#, Q235, STPY41, STPG38, STB30, STB33, STB35, STPT42 etc

14 inch LSAW tube Large diameter welded carbon steel pipe

Standard: ASME B36.10M /ANSI B36.10M, API, GB, SH, HG, MSS, JIS, DIN etc

14 inch LSAW steel pipe Thickness: DIN 8mm, JIS 7.9mm, ASME 6.35, 7.92, 9.52, 11.1315.09, 12.70, 19.05, 23.83, 27.79, 31.75, 35.71mm

Thickness Tolerance: ±12.5%

Length: Min 3 Meters, Max12 Meters, or according to customer’s requirement

Ends: Beveled/Straight cut, Plastic or Metal ends protetcors

Coating: Black painting/Vanish painting 3PE coated etc

Marking: According to standard or according the customer’s requirement

Large diameter pipes (Carbon Pipes) Usage

• Fluid, boiler, hydraulic, gas, oil, chemical fertilizer, structure pipes etc.
• For low pressure liquid delivery such as water, gas and oil Alpine zone, the sea, the city densely populated areas.

ERW pipes

ERW pipes means Electric Resistance Welded Pipes. ERW steel pipes and tubes are used. ERW steel pipes and tubes are used in various engineering purposes, fencing, scaffolding, line pipes etc. ERW steel pipes and tube are available in various qualities, wall thicknesses, and diameters of the finished pipes.

Our product finds its usage for Agricultural purposes, Drinking Water for housings, in collieries for extraction of Water, Thermal Powers, Transports, Hand pumps for deep boring wells, as a strong protection for cables by Telecom Department, Structural Purposes etc.

While manufacturing ERW steel pipes, only high-quality, continuous-cast, fully killed, control-rolled, fine-grain, low-carbon steel is used. High performance ERW steel pipes and tubing possess high strength corrosion resistance, high deformability, high strength and high toughness. We are among the leading manufacturers and suppliers of erw pipes and tubes in India. We are also one of the largest exporters of erw pipes and tubes in India. ERW pipes and tubes stands for Electric Resistance Welded pipes and tubes.

Based on the customers requirements we can manufacture erw pipes and tubes of different size and shape. We have a very large production capacity of erw pipes and tubes. ERW pipes and tubes are used in various engineering purposes, fencing, scaffolding, line pipes etc. ERW pipe is available in lengths from single random to 120 feet depending on mill capability. ERW pipe is available with square ends or beveled for welding, threaded and coupled and victaulic grooved. Surface finish are available in black or bare, or with protective coatings.

For pipes or tubes size 4 inch (10.2mm) OD and below, strip is fed into a set of forming rolls which consists of horizontal and vertical rollers so placed as to gradually from the flat strip in to a tube which is then allowed to pass the welding electrodes. The electrodes are copper disks connected to the secondary of a revolving transformer assembly.

Size:(ERW, HFI, EFW) and in wall thickness as shown in Table 1. 

but we can also produce other specification according to the customers’ requirements.

Outer Diameter: 6mm-610mm (1/16"-24")

Wall Thickness: 0.3mm-22mm 

Length: 0.5mtr-20mtr

ERW line pipe-- for the transportation of oil, natural gas and chemical materials
Standards: AP-5L PSL1/ PSL2 GB/T9711.1-1997 GB/T9711.2-1999Steel 
Grade ：A、B、X42、X46、X52、X56、X60、X65、X70

ERW Casing pipe--petroleum and nature air exploration
Standards： API SPEC 5CT, SY/T5989
Materials ：H40 J55 K55

Structure and Mechanical Roundpipe and Tubing 
Standards: JIS3466、JIS3445; ASTM A513; GB/T 6728-2002

Steel Materials: Carbon steel, Stainless, and low ally steel 
Structure and Mechanical Square or Rectangular Pipe
Standards: GB/T3091 JIS G3452
Steel grade: Q215A、Q215B、Q235AB 、Q295AB、Q345AB

Mill Test Certificate: EN 10204/3.1B 
Third party inspection: SGS, BV, Lloyds etc.