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1.1 This specification2 covers minimum-wall-thickness, seamless cold-drawn carbon steel tubes including bending into the form of U-tubes, if specified, for use in tubular feedwater heaters.
1.2 The tubing sizes covered shall be 5/8 to 11/4-in. [15.9 to 31.8-mm] outside diameter, inclusive, with minimum wall thicknesses equal to or greater than 0.045 in. [1.1 mm].
1.3 Optional supplementary requirements are provided, and when desired, shall be stated in the order.
1.4 The values stated in either inch-pound units or SI units are to be regarded separately as the standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the specification.
| Grade | C% | Si% | Mn% | P% | S% |
| B2 | 0.27 max | 0.10 min | 0.29-0.93 | 0.030 max | 0.030 max |
| C2 | 0.30 max | 0.10 min | 0.29-1.06 | 0.030 max | 0.030 max |
| Grade | Tensile Strength Mpa |
Yield Strength Mpa |
Hardness HRB |
| B2 | 410 min | 260 min | 79 min |
| C2 | 480 min | 280 min | 89 min |
Tolerances according to specification or according to agreement. Standard tolerances are:
| Hot finished | OD+/-1% | WT+/-12.5% |
| Cold finished | OD +/-0.75% | WT +/-10% |
1.Q: Who and where are you?
Shandong Huitong Steel Co., Ltd. is a large steel production enterprise. Our main production base is located at Liaocheng city, shandong province, China.
2.Q:What kind of metal material does your company do?
Our production scope involves seamless steel pipes, galvanized steel products, carbon steel plate, corrugated roofing sheet, color coated roll and other steels.
3.Q:What are the advantages in price and quality?
To offer good quality and competitive price is our company principle. We can offer our customer good and reasonable price.
4.Q: OEM Service is acceptable?
Yes, OEM severvice is available.
5.Q: Payment term and Lead time
A: Payment term is depending on target market condition,order amount,shipment schedule.., or 30% T/T in advance ,balance will be paid against BL copy or LC at sight.
B: Delivery time: for most of pipe,plate, coil.. the lead time is at around7- 15days. For larger order plate, it is subject to the steel plant production order, but. Base on our larger purchasing oder from steel mill, we can assure our customer the delivery date is soon.
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Main Product:
Seamless Steel Pipe,
Carbon Steel Plate,
Galvanized Steel Coil,
Color Coated Roll ,
Corrugated Roofing Sheet,
Welded Pipe
