ASME SA214 Welded carbon steel heat exchanger tubes
Standard: ASTM A214 / ASME SA214
Steel grade: Low carbon steel
Material shall conform to the applicable requirements of specification A450/A450M
| Carbon, max, % | 0.18 |
| Manganese, % | 0.27-0.63 |
| Phosphorous, max. % | 0.035 |
| Sulfur, max, % | 0.035 |
Process: Welded and cold drawn
The tubes cover minimum wall thickness.
Application: tubular heat exchangers, condensers, and other heat transfer apparatus
Dimensional range:
OD: 19.05-76.2mm
Any specific size is to be discussed before offer
The tube be 100% eddy current tested
Ultrasonic test is as option
Straightness ≤1mm/1000mm
Roughness: Ra ≤0.8
Heat treatment
After welding, all tubes shall be heat treated at a temperature not less than 900 and followed by cooling in air or in the cooling chamber of a controlled atmosphere furnace. Cold drawn tubes shall be heat treated after the final cold drawing pass at a temperature not less than 650
Test
- The tubes shall have a hardness test, it is not exceeding 72HRB.
- One flattening test shall be made on specimens from each of two tubes from each lot or fraction thereof.
- One flaring test shall be made on specimens from each of two tubes from each lot or fraction thereof.
- One reverse flattening test shall be made on a specimen from each 450m of finished tubing.
- Brinell or Rockwell hardness tests shall be made on specimens from two tubes from each lot.(when the final heat treatment is in a continuous furnace, a lot shall include all tubes of the same size and heat, heat treated in the same furnace at the same temperature, time at heat, and furnace speed)
- Each tube shall be subjected to the hydrostatic test or the nondestructive electric test. The client may specify which test is to be used.
Surface quality
The finished tubes shall be free of scale. A slight amount of oxidation shall not be considered as scale.
Mechanical properties
| Tensile strength, min, ksi (MPa) | 47 (325) |
| Yield strength, min, ksi (MPa) | 26 (180) |
| Elongation in 50mm, min, % | 35 |
Tubes shall be delivered with square cut ends. The ends are free of excessive burrs.
The tubes are bundled in the waterproof plastic sheet and packed in the wooden cases
The case is most suitable for hanging by forklift.
EN10204-3.1 MTC shall be issued
EN10204-3.2 MTC is as option
