Standards: ASTM A178 (ASME SA178)
ASTM A178/A 178M Standard Specification for Electric-Resistance-Welded Carbon Steel and Carbon-Manganese Steel Boiler and Superheater Tubes
Grade: Grade A Grade C Grade D
Size: OD 1/2in-5in(12.7-127mm)
Wall thickness:0.035in-0.360in(0.9-9.1mm)
Different name
Condenser steel tube,heat-exchanger tube,low carbon steel pipe,Resistance welded steel tube ,Bolier flues,Spoerheater flues and safe ends,ERW carbon steel pipes.
Chemical Composition:
| Element % | Grade D |
| Manganess Steel | |
| C | 0.27 Max |
| Mn | 1.00-1.50 |
| P | 0.030 |
| S | 0.015 |
| Si | 0.10 Min. |
Mechanical Property:
Grade C & Grade D tubes shall conform to the requirements -tensile properties prescribed below:
TensileRequirements |
|
Data |
GradeD |
Tensilestrength,min,ksi[MPa] Yieldstrength,min,ksi[MPa] Elongationin2in.or50mm,min,% For longitudinal strip tests a deduction for Each1⁄32-in[0.8mm]decreaseinwallthicknessbelow5⁄16in.[8mm] |
70[485] 40[275] 30 1.50A |
From the basic minimum elongation of the following percentage points shall be made
Outside diameter and Wall ThicknessTolerance:
| Outside Diameter tol | Wall thickness tol | ||
OD < 50 |
±0.05mm |
S < 4mm |
±12.5% |
OD > 50 |
±1% |
4--20mm |
+15/-12.5% |
S≧20mm |
±12.5% |
||
ASTM standards:
Manufacturing Process: ERW
Heat treatment:
After welding,all tubes shall be heat treated at a temperature of 1650°F(900℃) or higher 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-draw pass at a temperature of 1200°F(650℃)or higher.
Surface Condition:
Finished tubes shall be free of scale,A slight amount of oxidation will not be considered as scale.
Mechanical Tests Required:
Flattenting Test/Flaring test/Flange test/Crush test/Tension test/Reverse Flattening test/Hydrostatic or Nondestructive Electric Test
Usage
Used in boiler, superheater, heat-exchanger and pressure equipment in Petrochemical factory, Refinery factory, sugar mill, power plant, power plant, shipbuilding.
SA178 Heat Exchanger and Condenser Tubes in various Application Industries
Loading
Protected by plastic bag outside
Packed in container
Pipe caps as customer request
As per your requirement
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specification, Standard and identificationWelded steel pipe (steel pipe manufactured with a weld) is a tubular product made out of flat plates, known as skelp, that are formed, bent and prepared for welding.
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