Annealed / Pickled Stainless Steel Seamless Pipe , Astm A688 Welded Steel Pipe
Product Details
stainless tube steel
,large diameter stainless steel tube
ASTM A688 Annealed and Pickled Welded Stainless Steel Tube For Feedwater Heater
Seamless Stainless Steel tubes For Boiler and Heat Exchanger, are made according to the Chinese National Standard GB13296-91.
GB13296-91 is a standard applicable for Seamless Stainless Steel pipes which is used for boiler and heat exchanger.
GB13296-1991 Seamless Stainless Steel Tubes for Boiler, Heat Exchangers
0Cr18Ni9 1Cr18Ni9Ti 0Cr18Ni12Mo2Ti
Technical tandard: GB13296-91
Tolerance for seamless stainless boiler tube:
| Production Method | Size(mm) | Tolerance | |
| Hot Rolling(Extrusion) | OD | ≤140 | ±1.25% |
| ＞140 | ±1.0% | ||
| WT | ≤10 | ±12.5% | |
| ＞10 | ±15% | ||
| Cold Drawn(Cold Rolled) | OD | 8~30 | ±0.20mm |
| ＞30~50 | ±0.30mm | ||
| ＞50 | ±0.8% | ||
| WT | 1.0~3 | +12% -10% | |
| ＞3.0 | ±10% | ||
Length:
The length or general steel tube:
Hot Rolling(Extrusion) tube: 3~12 m
Cold Drawn(Cold Rolled) tube: 3~8 m
The length for water pipe & boiler steel pipe:
Hot Rolling(Extrusion) tube: 4~12 m
Cold Drawn(Cold Rolled) tube: 4~8 m
Bending tolerance:
WT≤15mm, Bending≤1.5mm/m
WT＞15mm, Bending≤2.0mm/m
End shape:
Both ends of the pipe should be cut at right angles, and remove burrs
Mechanical property
Heat treatment of longitudinal mechanical properties of steel pipe shall according to the standard.
| Material | Tensile strength MPa ≥ | Yield Strength MPa ≥ | Elongation % ≥ |
| 0Cr18Ni9 | 520 | 205 | 35 |
| 1Cr19Ni9 | 520 | 205 | 35 |
| 0Cr19Ni10 | 480 | 175 | 35 |
| 1Cr18Ni9Ti | 550 | 205 | 40 |
| 0Cr18Ni12Mo2Ti | 530 | 205 | 35 |
| 0Cr26Ni5Mo2 | 590 | 390 | 18 |
| 1Cr17 | 410 | 245 | 20 |
| 00Cr27Mo | 410 | 245 | 20 |
| 1Cr25Ti | 440 | 245 | 17 |
Hardness:
For the tubes which W.T. ≥2 mm, Rockwell hardness tests should be taken.
Tests of the seamless boiler tubes:
1.Bending Test:
The tubes should take the bending test when OD ≤22mm. The bending angle is 90 degrees, and the bending radius is 6 times the outer diameter of the steel tube.
2. Hydraulic test;
Eddy current testing, ultrasonic testing can be used instead of hydraulic tests. When eddy current testing, GB/T 7735-1995 Gr. A should be followed; when ultrasonic testing, GB/T 5777-1996 Gr. C8 should be followed.
3. Flattening test
4. Flanging test
5. Expand test
What is your Guarantee?
1.SO9001:2008 and TS16949 certification, SGS, BV, TUV or other third party inspection is available.
2.High quality with competitive price.
3.Advanced technology, experienced engineer, ISO quality system for quality assurance and traceability.
Do you have agent or distributor in our country?
1.We are recruiting area agent and distributor all over the world, welcome to send us your mail or call us for detail discussion.
How is your production capability?
1.2000 tons monthly production capacity, 5000 tons monthly trading capability
2.Prompt and Timely shipment
How to get the sample?
1.You are requested to pay for sample charges and courier charges from China to your country; and the free sample is according the product like size, steel grade and quantity, please consult our sales for details
2.Sample charges will be refunded when order is placed.
What is your Payment Term?
1.T/T: 30% deposit in advance, the balance 70% paid before shipment
2.30% down payment, the balance 70% paid against L/C at sight
3.Upon negotiation
Who are your customers?
1.Stockists, Distributors,Wholesalors,Agents, Traders, End Users, etc
How long will you react on our requirement?
1.Your requirement would be treated within 24 hours on weekdays. Quotations would be sent upon technical details confirmed by customer!
Any more questions about your doubts, please feel free to send us your emails or call!
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