Erw Carbon Steel Tubes For Boilers And Superheaters
Astm a178 boiler tubes offer cost-effective erw carbon steel solutions for boilers, superheaters, and heat exchangers.
Erw Carbon Steel Tubes For Boilers And Superheaters
Astm a178 boiler tubes offer cost-effective erw carbon steel solutions for boilers, superheaters, and heat exchangers.
ASTM A178 Boiler Tubes, also known as ASME SA178, are electric-resistance-welded (ERW) carbon steel and carbon-manganese steel tubes designed for high-temperature applications, including boiler tubes, superheater flues, heat exchanger tubes, and safe ends. Available in Grades A (low-carbon steel), C (medium-carbon steel), and D (carbon-manganese steel), these tubes comply with ASTM A178/A178M and ASME SA178 standards, ensuring reliable performance in demanding environments.
Manufactured through the ERW process, ASTM A178 Boiler Tubes are available in outside diameters from 1/2 to 5 inches [12.7–127 mm] and minimum wall thicknesses from 0.035 to 0.360 inches [0.9–9.1 mm]. Post-weld heat treatment at 1650°F [900°C] or higher ensures weld integrity and stress relief, while coatings like varnish or 3LPE enhance corrosion-resistant ERW boiler tubes for extended durability in harsh conditions.
These tubes undergo rigorous testing, including flattening, flaring, tension, reverse flattening, and hydrostatic or nondestructive electric tests, to ensure compliance with ASTM A178/ASME SA178 standards. Their cost-effective design compared to seamless tubes makes them ideal for boilers, superheaters, heat exchangers, boiler flues, safe ends, and air preheaters in power plants, chemical industries, and manufacturing facilities.
Compared to seamless ASTM A179 or A192 tubes, ASTM A178 Boiler Tubes provide a cost-effective solution for low to medium-pressure applications (up to 350 psi [2.4 MPa]). Their versatility supports critical applications, addressing challenges like corrosion, thermal stress, and high-temperature performance in steam generation systems.
ASTM A178 Boiler Tubes offer engineers reliable, high-quality solutions for steam generation and heat transfer systems, ensuring safety, efficiency, and longevity in critical infrastructure projects.
| Grade | C (% max) | Mn (% max) | P (% max) | S (% max) | Si (% min) |
|---|---|---|---|---|---|
| Grade A | 0.06–0.18 | 0.27–0.63 | 0.035 | 0.035 | - |
| Grade C | 0.35 | 0.80 | 0.035 | 0.035 | - |
| Grade D | 0.27 | 1.00–1.50 | 0.030 | 0.015 | 0.10 |
The chemical composition ensures weldability and corrosion resistance for ASTM A178 Tubes in high-temperature applications.
| Grade | Tensile Strength (MPa min) | Yield Strength (MPa min) | Elongation (% min) | Hardness (HRB max) |
|---|---|---|---|---|
| Grade A | 325 | 180 | 35 | 77 |
| Grade C | 415 | 255 | 30 | 79 |
| Grade D | 485 | 275 | 30 | 77 |
These properties ensure ASTM A178 Tubes deliver reliable performance in boiler and superheater applications.
| Feature | ASTM A178 | ASTM A179 | ASTM A192 |
|---|---|---|---|
| Manufacturing Process | ERW | Seamless | Seamless |
| Diameter Range | 1/2–5 inches | 1/8–3 inches | 1/2–7 inches |
| Wall Thickness | 0.035–0.360 inches | 0.035–0.360 inches | 0.085–1.000 inches |
| Applications | Boilers, superheaters, heat exchangers | Heat exchangers, condensers | High-pressure boilers |
| Pressure Rating | Up to 350 psi | Low to medium pressure | High pressure |
| Cost | Low to Moderate | Moderate to High | High |
Why Choose ASTM A178 Tubes? Their cost-effective ERW construction and reliable performance make them ideal for boiler, superheater, and heat exchanger applications compared to seamless tubes.
| ASTM STANDARD | UNS NO. | KOREA/JAPANESE | GERMAN | BRITISH | BELGIAN | FRENCH | ITALIAN | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| KS/JIS Symbol | KS/JIS Number | Remarks | DIN Type | DIN Number | Material Number | Remarks | B.S Number | B.S Grade | NBN Type | NBN Grade | Remarks | AFNOR Type | NF Number | Remarks | UNI Type | UNI Number | Remarks | |||
| ASTM A178C-Steel Electric-Resistance-Welded Boiler Tubes | ||||||||||||||||||||
| Grade A | K01200 | STBH 340 / STB 35 | D3563 / G3461 | St 37.8 | 17177 | 1.0315 | (7) | 3059 | ERW 320 | (3) | (3) | |||||||||
| Grade C | K03503 | SHBH 410 / STB 42 | D3563 / G3461 | St 42.8 | 17177 | 1.0498 | (7) | (3) | (3) | |||||||||||
| ASME | EN | DIN | JIS |
|---|---|---|---|
| ASME SA178 | EN 10217-2 | DIN 17177 | JIS G 3461 |
ASTM A178 tubes are available in various sizes, with the following common dimensions:
The permissible variations in dimensions are as follows:
Several tests are performed to ensure the quality and integrity of ASTM A178 ERW steel pipes:
ASTM A178 Tubes are engineered for high-temperature performance and corrosion resistance, making them ideal for boiler tubes, superheater flues, heat exchangers, boiler flues, safe ends, and air preheaters in critical infrastructure projects.
Used in water walls and economizers for steam generation in industrial boilers.
Increases steam temperature in superheater sections for enhanced efficiency.
Facilitates heat transfer in industrial heat exchanger systems.
Conveys combustion gases in boiler systems with high durability.
Joins tubes of different materials or thicknesses in boiler systems.
Preheats combustion air using flue gases for improved efficiency.
Why Choose ASTM A178 Tubes? Their high-temperature performance and cost-effective ERW design make ASTM A178 Tubes ideal for boiler, superheater, and heat exchanger applications, ensuring reliable operation.
Astm a178 grade a tubing offers cost-effective erw...
