Welded Round Uaustenitic Stainless Steel Tubes For Feed Water Heater
Product Description
TORICH ASTM SA-688/SA-688M Welded Austenitic Stainless Steel Feedwater Heater Tuebs
heat exchanger stainless steel tubes
| Standard | SA-688/SA-688M |
| OD | 15.9-25.4MM |
| WT | ≥0.7mm |
| Length | 1-12m or according to customers' actual application |
| Steel Grade | 304, 304L, 316, 316L, XM-29, 304N, 316N |
| Application | Feeduater Heater Tuebs |
| Technology | Cold Rolled Hot Rolled Cold Drawn |
Chemical Requirements
| Element | Grade | TP304 | TP304L | TP304LN | TP316 | TP316L | TP316LN | TP XM-29 | TP304N | ... |
| UNS Designation | S30400 | S30403 | S30453 | S31600 | S31603 | S31653 | S24000 | S30451 | S31651 | |
| C, max | 0.08 | 0.035 | 0.035 | 0.08 | 0.035 | 0.035 | 0.060 | 0.08 | 0.08 | |
| Mn, max | 2.00 | 2.00 | 2.00 | 2.00 | 2.00 | 2.00 | 11.50-14.50 | 2.00 | 2.00 | |
| P, max | 0.040 | 0.040 | 0.040 | 0.040 | 0.040 | 0.040 | 0.060 | 0.040 | 0.040 | |
| S, max | 0.035 | 0.030 | 0.030 | 0.030 | 0.030 | 0.030 | 0.030 | 0.030 | 0.030 | |
| Si, max | 0.75 | 0.75 | 0.75 | 0.75 | 0.75 | 0.75 | 1.00 | 0.75 | 0.75 | |
| Ni | 8.00-11.00 | 8.00-13.00 | 8.00-13.00 | 10.00-14.00 | 10.00-15.00 | 10.00-15.00 | 2.25-3.75 | 8.00-11.0 | 10.00-14.00 | |
| Cr | 18.00-20.00 | 18.00-20.00 | 18.00-20.00 | 16.00-18.00 | 16.00-18.00 | 16.00-18.00 | 17.00-19.00 | 18.0-20.0 | 16.0-18.0 | |
| Mo | ... | ... | ... | 2.00-3.00 | 2.00-3.00 | 2.00-3.00 | ... | ... | 2.00-3.00 | |
| Ni | ... | ... | 0.10-0.16 | ... | ... | 0.10-0.16 | 0.20-0.40 | 0.10-0.16 | 0.10-0.16 | |
| Cu | ... | ... | ... | ... | ... | ... | ... | ... | ... |
Mechanical properties
| Grade | 304 316 | 304L 316L | XM-29 | 304N 316N | 304LN 316LN |
| Tensile Strength, min ksi (Mpa) | 75 (515) | 70 (485) | 100 (690) | 80 (550) | 75 (515) |
| Yeild Strength, min ksi (Mpa) | 30 (205) | 25 (175) | 55 (380) | 35 (240) | 45 (310) |
| Elongation in 2 in. or 50mm, min, % | 35 | 35 | 35 | 35 | 30 |
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 and Cold Rolling, on line inspection
5. Heat Treatment, +A, +SRA, +LC, +N, Q+T
6. Straightening-Cutting to specified length-Finished Measuring Inspection
7. Machanical Testing in own labs with Tensile Strength, Yield Strength, Elongation, Hardness, Impact, Mictrostruture etc
8. Packing and Stocking.
100% of our steel tubes are dimensionally checked
100% of our steel tubes are visually checked to assure they have a perfect surface condition and no surface defects.
100% eddy current test and ultrosonic test to eliminate longitudinal and transversal defects.
Q: Are you trading company or manufacturer ?
A: We are factory.
Q: How long is your delivery time?
A: Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to quantity.
Q: Do you provide samples of honed tube ? is it free or extra ?
A: Yes, we could offer the sample for free charge but do not pay the cost of freight.
Q: What is your terms of payment ?
A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance ,balance before shippment.
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