ERW steel pipes

ERW pipes means Electric Resistance Welded Pipes.  ERW steel pipes and tubes are used in various engineering purposes, fencing, scaffolding, line pipes etc. 


Special coated pipes
API 5L ERW pipes
Thick wall ERW pipes
DIN ERW steel pipes

ASTM A53 ERW pipes
Large diameter pipes
ASTM ERW Steel Pipes
JIS ERW steel pipes

ERW steel pipes and tube are available in various qualities, wall thicknesses, and diameters of the finished pipes. ERW pipes means Electric Resistance Welded Pipes. A plate rolled to become a pipe and welded using Electric Resistance Welding process. Usully for for high diameter. (cheapest process avaiable)

ERW pipes means Electric Resistance Welded Pipes. 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. 
We can produce precision and high-frequency welded steel tubes and pipes with all possible dimensions and shapes available.

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. 
ERW Black Steel Pipes and tubes are used in various engineering purposes, fencing, scaffolding, line pipes etc. These tubes & pipes are available in varying qualities, wall thickness, diameters and finishes depending on the requirement of the end-users.

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

Quality Standard: 
ERW HFI , EFW, LSAW, DSAW: 
GB/T3091 Welded steel pipe for low pressure liquid delivery
GB/T9711 Petroleum and natural gas industries--Steel pipe for pipelines
IS: 3589 Steel tubes for water and sewage  
IS : 1978-1982  Steel tubes for use in transportation of oil; gas & Petroleum products  
BS: 1387 Steel Tubes for use for Water, Gas, Air and Steam
ASTM A53 Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless
DIN 2458 WELDED STEEL PIPES AND TUBES
EN10217 Welded steel tubes for pressure purposes. Technical delivery conditions. Non-alloy steel tubes with specified room temperature properties 
API 5L Line Pipe
SAW SSAW:
SY/T5037 Spiral submerged arc-welded steel pipe for pipelines for low pressure field fluid service
SY/T 5040 Spiral submerged arc-welded steel pipe piles
CJ/T 3022 Spiral submerged-arc welded steel pipe for municipal heat supply
IS : 1978 Steel tubes for use in transportation of oil; gas & Petroleum products
ASTM A252 WELDEDAND SEAMLESS STEEL PIPE PILES
Coating Standard:
ANSI/AWWA C104/A21.4 American National Standard for Cement-Mortar Lining for Ductile-Iron Pipe and Fittings for Water
ISO 21809 Petroleum and natural gas industries -- External coatings for buried or submerged pipelines used in pipeline transportation systems
DIN 30670 Polyethylen coatings of steel pipes and fittings

Applications of Welded Steel Pipe:

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.


Size:
ERW, HFI, EFW:
Outer Diameter: 6mm-610mm (1/16"-24")
Wall Thickness: 0.3mm-22mm
Length: 0.5mtr-20mtr

LSAW, DSAW:
Outer Diameter: 219mm-1820mm
Wall Thickness: 5.0mm-50mm
Length: 6mtr-18mtr

SAW SSAW:
Outer Diamter: 219.1mm - 4064mm (8" - 160")
Wall Thickness: 3.2 mm - 40mm
Length: 6mtr-18mtr

Pipe End: 
square ends (straight cut, saw cut, and torch cut). or beveled for welding, beveled, 
Surface:
Lightly oiled, Hot dip galvanized, Electro galvanized, Black, Bare, Varnish coating/Anti rust oil, Protective Coatings (Coal Tar Epoxy,  Fusion Bond Epoxy, 3-layers PE)
Packing: 
Plastic plugs in both ends, Hexagonal bundles of max. 2,000kg with several steel strips, Two tags on each bundle, Wrapped in waterproof paper, PVC sleeve, and sackcloth with several steel strips, Plastic caps.
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 
Third party inspection: SGS, BV, Lloyds etc.

Note:
Tolerances include allowance for convexity or concavity. For rectangular tubing having a ratio of outside large to small flat dimension less than 1.5, and for square tubing, the tolerance on small flat dimension shall be identical to the large flat dimension tolerance.
For rectangular tubing having a ratio of outside large to small flat dimension in the range of 1.5 to 3.0 inclusive, the tolerance on small flat dimension shall be 1.5 times the large flat dimension tolerance.
For rectangular tubing having a ratio of outside large to small flat dimension greater than 3.0, the tolerance on small flat dimension shall be 2.0 times the large flat dimension tolerance.

Impact test requirements for ASTM A500 Gr.C
ASTM A500 is a classification that covers material used for welding and seamless carbon steel structural tubing. The classification has three grades, with Grade C being a newer mixture that is primarily used for roll cages and cold temperatures. ASTM A500 Grade C must meet certain requirements in order to pass impact tests administered by ASTM. Originally known as the American Society for Testing and Materials, ASTM is an international standards developing organization that establishes standards when dealing with metals and other materials used in industrial areas.

Mixture Requirements

According to ASTM rules, all tubing must have the chemical mixtures of carbon, manganese, phosphorus, sulfur and copper present. In addition, the steel produced must be done by open-hearth, basic-oxygen or electric-furnace melting methods. It is not enough to have the correct chemicals mixed in the tubing; materials must also undergo specific welding methods in order to be approved by .

Welding Procedures

In addition to the three aforementioned steel-producing methods, tubing must also be welded using flat-rolled steel. The flat-rolled steel should be formed into a tube using the electric-resistance welding process. Using the electric-resistance welding process will assist the material in passing the tension and flattening test that evaluates the sturdiness of the piece.

Shape

ASTM rules require that the longitudinal butt joint of the tubing be thickly welded in order to assure the secure structural design of the piece. ASTM will not approve tubing that has a weak joint because such weakness may pose a problem to the entire structure. Thousands of structures built with poor still joints would be in danger of collapsing if the ASTM did not uphold this regulation.

Inspection

Before the manufacturer is given permission to market products, all tubing must be inspected by an ASTM representative. The purpose of the inspection is to assure conformance to structure requirements; tubing that fails to pass inspection must either be corrected or discarded. In addition, the appearance of tubing must be professional and free from defects; it should not, for example. be severely burned or have bumps or blotches of steel in any one place.

Get in touch

Shanghai is the largest city by population in the People's Republic of China (PRC)and the largest city proper by population in the world. It is one of the four province-level municipalities of the PRC, with a total population of over 23 million as of 2010.