ERW Black Steel Tubes & Pipes
ERW stands for Electric Resistance Welded, and these pipes and tubes made using an Electric Resistance Welding process
Manufacturing:
They are made from flat sheets of steel that are cold-formed into a cylindrical, square, rectangular shape, then welded longitudinally. During the welding process, an electric current is passed between the two edges of the steel to heat it, which causes the edges to melt and fuse together.
They are made from flat sheets of steel that are cold-formed into a cylindrical, square, rectangular shape, then welded longitudinally. During the welding process, an electric current is passed between the two edges of the steel to heat it, which causes the edges to melt and fuse together.
Applications:
They are widely used in a variety of applications, including transporting water and sewage, oil and gas industries, boiler and condenser tubes, and high-pressure applications due to their strength and durability.
They are also used in the automobile industry.
They are widely used in a variety of applications, including transporting water and sewage, oil and gas industries, boiler and condenser tubes, and high-pressure applications due to their strength and durability.
They are also used in the automobile industry.
Sizes and Specifications:
They can be manufactured in a range of sizes and thicknesses, making them versatile for different applications. They are typically available in diameters from a few inches up to several feet.
They can be manufactured in a range of sizes and thicknesses, making them versatile for different applications. They are typically available in diameters from a few inches up to several feet.
Advantages:
They have a smooth surface finish and uniform wall thickness.
They are generally cost-effective to produce and have good mechanical properties.
They have a smooth surface finish and uniform wall thickness.
They are generally cost-effective to produce and have good mechanical properties.
Round Pipes
IS: 1161: 2014
TOLERANCES:
a) Outside diameter:
b) Thickness (for all sizes):
c) Weight
| Up to and including: | + 0.4 mm |
| Over 48.3 mm | ± 1% |
| Welded tubes: | ± 10 percent |
| Over 48.3 mm: | ± 1% |
| Single tube: | ± 10 percent |
| 10 tonne lots: | ± 7.5 percent |
IS:1239:2004
TOLERANCES:
a) Outside diameter:
b) Thickness (for all sizes):
c) Weight
a) Outside diameter:
| Light Tubes | +not limited -8% |
| Medium and Heavy | +not limited -10% |
| Single Tubes (Light series) | ± 10 -8% |
| Single Tubes (Medium and Heavy series) | ± 10% |
| For qualities per load of 10 tones minimum (Light series) | ± 7.5% -5% |
| Single tube: | ± 10 percent |
| 10 tonne lots: | ± 7.5 percent |
IS 3601:2006
TOLERANCES:
Thickness
The tolerance on thickness excluding the weld shall be ±10 percent
The tolerance on thickness excluding the weld shall be ±10 percent
Square Pipes
IS 4923:2017
| GRADE | OUTSIDE DIMENTION | THICKNESS | SQUARENESS | CORNER RADIUS | WEIGHT INDIVIDUAL LENGTHS | WEIGHT ON LOT OF 10 MT | CUSTOMIZED OFFER |
|---|---|---|---|---|---|---|---|
| YSt-210 YSt-240 YSt-310 YSt-355 |
±1% with a minimum of ±0.50mm | ±7.5% | 90deg. ±2deg. | 3t max | -8%, +10% | ±7% | Length -4M to 12M |
Rectangular Pipes
IS 4923:2017
| GRADE | OUTSIDE DIMENTION | THICKNESS | SQUARENESS | CORNER RADIUS | WEIGHT INDIVIDUAL LENGTHS | WEIGHT ON LOT OF 10 MT | CUSTOMIZED OFFER |
|---|---|---|---|---|---|---|---|
| YSt-210 YSt-240 YSt-310 YSt-355 |
±1% with a minimum of ±0.50mm | ±7.5% | 90deg. ±2deg. | 3t max | -8%, +10% | ±7% | Length -4M to 12M |
