Product Name: SA178 Grade A C D Electric Resistance Welded Carbon Steel Pipe Boiler and Superheater Tubes
Size Range: OD: 12.7-127mm, WT: 0.9-9.1mm, Length: 5.8m/6m, maximal 11.8m
Applications: For Boilers, Superheaters, Heat-Exchangers, Condensers, Boiler flues, Superheater flues and Safe ends
Heat treatment:
After welding, all tubes are heat treated at a temperature of 1650℉ (900℃) or higher and followed by cooling in air or in the cooling chamber of a controlled atmosphere furnace.
Cold-Drawn tubes are heat treated after the final cold-draw pass at a temperature of 1200℉(650℃)or higher.
Quality Control:
1. Incoming Raw Material Inspection
2. Raw Material Segregation to avoid steel grade mix-up
3. Heating and Hammering End for Cold Drawing
4. Cold Drawing or Cold Rolling, On line inspection
5. Heat Treatment
6. Straightening/Cutting to specified length/Finished Measuring Inspection
7. Quality Testing in own lab with Tensile Strength, Yield Strength, Elongation, Hardness, Straightness, etc.
8. Packing and Stocking.
100% Eddy Current Testing.
100% Size Tolerance Checking.
100% Tube surface checking to avoid surface defects.
| Product Name | SA178 Electric Resistance Welded Carbon Steel Boiler Tubes |
| Material | Grade A, Grade C, Grade D |
| Delivery Condition | Heat Treatment |
| Standard | SA178 |
| Application | Heat Exchanger, Condensers and similar heat transfer apparatus |
| Certificate | ISO 9001 |
| HS code | 7304319000 |
| Delivery Time | 40 days |
| Packing | Bundles or Wooden Boxes |
Chemical Properties
| Element | Grade A,Low-Cabon Steel | Grade C,Medium-Carbon Steel | Grade D, Carbon-Manganese Steel |
| Carbon | 0.06-0.18 | 0.35 Max | 0.27Max |
| Manganese | 0.27-0.63 | 0.80Max | 1.00-1.50 |
| Phosphorus,Max | 0.035 | 0.035 | 0.030 |
| Sulfur,Max | 0.035 | 0.035 | 0.015 |
| Silicon | - | - | 0.10 min |
| Mechanical Properties | Grade A | Grade C | Grade D | |
| Tensile Strength:min ksi(Mpa) | 47(325) | 60(415) | 70(485) | |
| Yield Point:min ksi(Mpa) | 26(180) | 37(255) | 40(275) | |
| Elongation | ≥35% | ≥30% | ≥30% | |
Applications:
1, For evaporator, heat exchangers, condensers, heat transfer equipment and similar pipes.
2, Widely used in the mechanical treatment field, petrochemical industry, transport and construction field
3, Ordinary structural purposes and mechanic structural purposes, for example in construction field, fulcrum bearing etc;
4, The transportation of fluids in the projects and big equipments, for example transport of water, oil, gas etc
5, Can be used in low and medium pressure boiler for the transportation of fluids, for example steam tube, big smoke tube, small smoke tube, generating tube etc
Inspection and Test:
Chemical Composition Inspection, Mechanical Properties Test(Tensile Strength,Yield Strength,
Elongation, Flaring, Flattening, Bending, Hardness, Impact Test), Surface and Dimension Test,No-destructive Test, Hydrostatic Test.
Surface treatment:
Oil-dip, Varnish, Passivation, Phosphating, Shot Blasting
