ERW Steel Tubes Black And Galvanized Used For Mechanical , General Engineering Purpose
Electric Resistance Welded (ERW) Pipes are manufactured from Hot Rolled Coils / Slits. All the incoming coils are verified based on the test certificate received from steel mill for their chemistry and mechanical properties. ERW pipe is cold-formed into a cylindrical shape, not hot-formed. Instead of flame, electric current is used for heating edges of the strip for weld fusion. This welding process does not need any filler metal. Instead, the welding pressure causes some of the metal to be squeezed from the joint, forming a bead of metal on inside and outside of the tube. This bead or welding flash is trimmed or completely removed during the process.
Product: | ERW (Electric Resistance Welded ) Steel Pipe, ERW Carbon Steel Pipe |
Application: | Used for Oil/Gas/Water transmission,Machinery Manufacturing |
Size: | OD: 114.3-609.6mm |
WT: 3.0-20mm | |
LENGTH: 5.8~23m | |
Pipe Standard: | API 5L PSL1/PSL2 Gr.A,Gr.B,X42,X46,X52,X56,X60,X65,X70 |
ASTM A53 ASTM A500 JIS G3466 | |
ASTM A252 ASTM A178 | |
AN/NZS 1163 AN/NZS 1074 | |
EN10219-1 EN10217-1 |
During production, online visual inspection is also carried out for surface defects, diameter accuracy, ovality and weld bead shape. Required sample rings as per specification are cut to carry out mechanical testing of weld and body e.g. flattening test, bend test etc. All pipes are then processed in finishing and testing area for pipe end preparation i.e. Facing/Bevelling followed by hydrostatic pressure testing as per specification.
Individual pipe is then visually inspected for the parameters specified in the specification before offering to the customer's inspection, if any. Data of all tests is re-verified and submitted to the customers.