ASTM A250 Electric-Resistance Welding Boiler Tube

Key Specifications/Special Features:

1) Size: outer diameter 1/2-5 inches (12.7-127mm)
Wall thickness: 0.035-0.320 inches (0.9-8.1mm)

2) Manufacturing process:
Electric-resistance welding

3) Heat treatment:
1. After welding, or when cold finished, after the final cold-drawing pass, all tubes shall be heat treated and except as provided in 5 3 2, furnished in the full annealed, isothermal annealed, normalized or normalized and tempered condition at the option of the manufacturer, if furnished in the normalized and tempered condition, the minimum tempering temperature shall be 1200°F (350ºC) except T22 shall be tempered at 1250° (676ºC) minimum
2. When grades T1.T1a, T1b and T2 are cold finished, the tubes may at the option of the manufacturer, be heat treated after the final cold-drawing pass at a temperature of 1200°F or higher, provided one of the heat treatments specified in 5 3 1 was applied after welding

4) Mechanical tests required:
Flattening test
Flange test
Reverse flattening test
Hardness test
Hydrostatic or nondestructive electric test


Tests we apply to the tubes:
1. Chemical composition analysis
2. Mechanical properties (tensile strength, yield strength, elongation, hardness)
3. Technological test (flattening test, flaring test, bending test, hydraulic pressure test)
4. Surface quality detection
5. Eddy-current examination
6. Visual test

Applications:
1. Architectural/civil engineering: cladding, handrails, door and window fittings, street furniture, structural sections, enforcement bar, lighting columns, lintels, masonry supports.
2. Transport: exhaust systems, car trim/grilles, road tankers, ship containers, ships chemical tankers, refuse vehicles.
3. Chemical/pharmaceutical: pressure vessels, process piping.
4. Oil and gas: platform accommodation, cable trays, sub-sea pipelines.
5. Medical: surgical instruments, surgical implants, food processing
6. Food and drink: catering equipment, brewing, distilling, food processing.
7. Water: water and sewage treatment, water tubing, hot water tanks
8. General: springs, fasteners (bolts, nuts and washers) wire.

Packaging:
1. Bundle packing, wooden cases or as customer's request.
2. Beveled end or plain end or varnished as per buyer's required
3. Marking: as per customer's requests

Delivery lead time: with 15-30 days after full payment received
Our services: third party inspection accepted such as SGS, BV.