1. Definition
Welded pipe is a type of pipe that is manufactured by rolling a flat sheet of steel into a cylindrical shape and then welding the seam to form a pipe. The welding process can be done using various methods such as Electric Resistance Welding (ERW), Submerged Arc Welding (SAW), or Gas Tungsten Arc Welding (GTAW). Welded pipes are commonly used in various industries for the transportation of fluids and gases.
2. Manufacturing Process
Application
Standard Specification ASTM A 53 – Grade A,B
Standard Specification ASTM A178- Grade A,C,D
Standard Specification ASTM A214
Standard Specification ASTM A252- Grade 1,2,3
Standard Specification ASTM A500- Grade A,B,C,D
Standard Specification ASTM A795- Grade A,B
Standard Specification API 5L
Standard Specification API 5CT
4. Inspection & Test Plan
| No. | Activity Description | Documentation |
| 1 | Plate receipt inspection and Cross check Plates Certificates | Mill Test Certificates EN10204. 3.1/ 3.2 |
| 2 | WPS & PQR and Welding Operator, Welder and Status | – Approved PQRs/WPSs, – Welder & Welding operator qualification certificated/records |
| 3 | Check NDE Operator List & Status | NDE Operator List |
| 4 | Check Procedure Approval | |
| 5 | Check Manufacturing Specification | |
| 6 | Check Fit-up and Tack Welding | |
| 7 | Welding & Visual Inspection | Dimensional & Visual Inspection Report |
| 8 | Cold Calibration, Size Inspection | Dimensional & VisualInspection Report |
| 9 | NDT Inspection | NDT Report (MPI, UT, RT) |
| 10 | Repair & recheck of NDE repairs | NDT Report |
| 11 | Production test | Production test report |
| 12 | Marking | Dimensional & Visual Inspection Report |
| 13 | Final Visual & Dimesional Inspection | Dimensional & Visual Inspection Report |
| 14 | Packing |
5. What is HSTECH can offer?
– Origin: South of Korea
– Grade: Various, depend up on the demands.
– Delivery time: Up to project requirements
– Material Certificate: EN 1024 type 3.1 , 3.2
– Expediting service
– Document Control