مكان المنشأ:
تشجيانغ/الصين
اسم العلامة التجارية:
TORICH
إصدار الشهادات:
ISO9001 ISO 14001 TS16949
رقم الموديل:
SA178
SA178 (equivalent to ASTM A178) is a minimum-wall-thickness electric-resistance-welded (ERW) tubing product made from carbon steel (Grade A, Grade C) and carbon-manganese steel (Grade D). It is widely specified for boiler tubes, boiler flues, superheater flues, and safe ends, and is also commonly selected for heat-transfer service where stable weld quality and consistent mechanical properties are required.
Manufacturing process: ERW (electric-resistance welded)
Typical size range covered by the specification:
Outside diameter: 1/2" to 5" (12.7–127 mm)
Minimum wall thickness: 0.035" to 0.320" (0.9–9.1 mm)
Heat treatment (key requirement): after welding, tubes shall be heat treated at 1650°F (900°C) or higher, then air-cooled (or controlled-atmosphere cooling).
Common supply options (by order): fixed/random length, end finish (plain/beveled), surface protection (oiled / anti-rust), and inspection level (hydrostatic or NDT electric test per standard).
Reliable weld seam + mandatory post-weld heat treatment for uniform microstructure and stable performance at elevated temperature.
Minimum-wall-thickness design for efficient heat transfer and responsive thermal performance in heat exchangers and boilers.
Verified by mechanical/forming/testing requirements (tension, flattening, flange, reverse flattening, hydrostatic or nondestructive electric test).
“Can you guarantee weld integrity and leak-tightness?”
Yes. SA178/ASTM A178 requires tubes to undergo flattening, flange, tension, reverse flattening, and hydrostatic (or nondestructive electric) testing—directly targeting weld soundness and pressure tightness.
“How do you ensure internal quality (hidden defects) for exchanger tubes?”
In addition to standard-required testing, we can provide enhanced NDT programs. Eddy current testing (ECT) is one of the most widely used tube inspection methods for locating discontinuities in heat exchanger tubing, and can be specified when higher integrity screening is needed.
“Will tube surface/consistency affect heat transfer and fouling?”
Absolutely—surface condition matters. A smoother, more uniform tube surface supports better heat transfer efficiency and can reduce fouling tendency in service. We focus on dimensional stability and surface control suitable for heat-transfer applications.
| Grade / Spec | C (%) | Mn (%) | P max (%) | S max (%) | Si |
|---|---|---|---|---|---|
| SA178 / ASTM A178 Grade A | 0.06–0.18 | 0.27–0.63 | 0.035 | 0.035 | Not specified |
| SA178 / ASTM A178 Grade C | 0.35 max | 0.80 max | 0.035 | 0.035 | Not specified |
| SA178 / ASTM A178 Grade D | 0.27 max | 1.00–1.50 | 0.030 | 0.015 | 0.10 min |
| SA210 / ASTM A210 Grade A-1 | 0.27 max | 0.93 max | 0.035 | 0.035 | 0.10 min |
| SA179 / ASTM A179 | 0.06–0.18 | 0.27–0.63 | 0.035 | 0.035 | Not specified |
| Grade / Spec | Tensile Strength min | Yield Strength min | Elongation min |
|---|---|---|---|
| SA178 / ASTM A178 Grade A | 325 MPa | 180 MPa | 35% |
| SA178 / ASTM A178 Grade C | 415 MPa | 255 MPa | 30% |
| SA178 / ASTM A178 Grade D | 485 MPa | 275 MPa | 30% |
| SA210 / ASTM A210 Grade A-1 | 415 MPa | 255 MPa | 30% |
| SA179 / ASTM A179 | 325 MPa | 180 MPa | 35% |
ASTM / ASME: ASTM A178/A178M (ASME SA-178/SA-178M) ERW boiler & superheater tubes.
EN (Europe): EN 10217-1 (electric welded steel tubes for pressure purposes; delivery conditions and room-temperature properties).
GOST (Russia/CIS): GOST 10704-91 / GOST 10705-80 (electric welded steel tubes; technical conditions).
JIS (Japan): JIS G 3461 (carbon steel tubes for boiler and heat exchanger service).
GB (China): GB/T 3087 (seamless steel tubes for low/medium pressure boilers), GB/T 5310 (seamless steel tubes for high pressure boilers), GB/T 3091 (welded steel pipes for low pressure fluid delivery).
Typical industries: power generation, petrochemical & refining, chemical processing, marine systems, district heating, industrial utilities.
Where it is used (examples):
Shell-and-tube heat exchangers: heat transfer tube bundles (coolers, heaters, recuperators)
Condensers & feedwater heaters: condensate cooling and heat recovery lines
Boiler systems: water wall/economizer-related tubing, flues, and superheater-associated tube runs (when specified to SA178 scope)
A: manufacturer,also can do trading.
A: Generally speaking,it is 10-15 days if the goods are in stock,or it is 30-40 days if the goods are not in stock,
it is according to quantity.
A: Yes, we could offer the sample for free charge but need pay the cost of freight.
A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.
If you have another question, pls feel free to contact with me.
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