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ERW Pipes:

ERW Pipes or an electric resistance welded (ERW) pipe is made from steel.

Some facts about ERW Pipes:

• ERW pipe is made by rolling metal and then heating the two edges with electricity to form a weld down its length.
• ERW pipe is extremely strong and durable as there are no fusion metals used during the manufacturing process.
• The weld seam cannot be seen or felt which is a major difference when looking at the double submerged arc welding process, where an obvious welded bead can be created that might need to be eliminated.
• The process is far easier and safer with the advances in high-frequency electric currents for welding
• ERW stainless steel pipes can be  manufactured by using HR Coils.
• The metal are rolled and then welded longitudinally across its length to make ERW pipes.
• A ribbon of steel pulled through a series of rollers and formed into a tube which is fused through a electric charge to form a ERW pipe cold.
• These pipes are mainly used for low or medium pressure applications such as transportation of water and oil.
• ERW Steel Pipe range from 23 inch OD to 24 inch OD in a various length to more than 100 feet.
• Surface finishes can be in bare and coated formats and processing can be handled on site to customer specifications.
• High frequency Induction Welding Technology is used in the manufacturing of ERW Pipes.
• Flat sheet metals are used to produce ERW welded pipe which are round pipes.
• Low-frequency or high-frequency resistance are used in making of ERW steel pipes.
• The current flows through the contact surface of the welding area during the welding of ERW pipe to generate heat. The 2 edges of the steel are heated to the point where one edge can form a bond.
• The edges of the tube blank melt and squeeze together under the action of the combined pressure at the same time.
• High efficiency, low cost, material saving, easy automation are some of the advantages of ERW pipe.
• The tube standards and specifications for Stainless steel ERW pipe include ASTM A269 stainless tube, ASTM A312 Stainless pipe, ASTM A270 sanitary tubing and ASTM A790 ferritic/austenitic/duplex stainless pipe.
• Carbon steel pipe in ERW can have ASTM A53 Grade B and A, ASTM A252 pile pipe, ASTM A500 structural tubing, EN 10219 S275, S355 pipe and ASTM A134 and ASTM A135 pipe.
• API ERW Line pipe can have API 5L B to X70 PSL1 and API 5CT J55/K55, N80 casing and tubing
• ERW Hollow Steel Sections can be used for Structural use as per IS 4923 with all sizes and grades and thickness upto 10.0mm.
• ERW Steel Tubes can be used for water wells as per IS 4270.
• ERW Black and Galvanized Steel Tubes are used for mechanical and general engineering purpose as per IS 3601.