Yuhong Holding Group Co.,LTD
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| Place of Origin: | CHINA |
| Brand Name: | YUHONG |
| Certification: | ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008 |
| Model Number: | ASTM A790 UNS S31803/S32205 |
| Minimum Order Quantity: | 100KGS |
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| Price: | Negotiable |
| Packaging Details: | Ply-wooden Case /Iron Case/ Bundle with plastic Cap |
| Delivery Time: | Depending on QTY |
| Payment Terms: | T/T, L/C AT SIGHT |
| Supply Ability: | 500 TONS | Material Grade: | S31803/S32205 |
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| Standard: | A789/A790/A928 | NDT: | ET, UT, HT, PT |
| Application: | Industry, Oil And Gas | Type: | Seamless/Welded |
| High Light: | Seamless Stainless Steel Pipes,S31803 Duplex Stainless Steel Pipes,ASTM A790 Pipe |
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The specification covers seamless and straight-seam welded ferritic/austenitic steel pipe for general corrosive service, with particular emphasis on resistance to stress corrosion cracking. The pipe shall be made by the seamless or an automatic welding process, with no addition of filler metal in the welding operation. Heat analysis shall be made to determine the percentages of the elements specified. Tension tests, hardening tests, flattening tests, hydrostatic tests and nondestructive electric tests shall be made to conform to the specified requirements.
Stainless steel alloy grades such as UNS S31803 prove to be particularly useful in applications that are susceptible to stress related corrosion cracking. SCC or stress related corrosion cracking in pipes can have harmful effects on not only the workers in the factory but also to the business itself. Since ASTM A790 UNS S31803 Duplex Steel Seamless Pipe is resistant to SCC, the piping system becomes durable and it has longevity in comparison to conventional steels.
Besides having superior resistance to SCC, the ASME SA 790 UNS S31803 Pipe has improved mechanical characteristics like higher yield strength, which incidentally is almost twice that of a traditional austenitic stainless steel alloy. Pipes under specification ASTM A790, are produced either in a seamless manner or they have a welded construction. The automatic welding process used to weld the ASTM A790 Pipe is to be done without the use of any filler metal. The specification also calls for determining the percentage of elements used to alloy both ASTM A790 Grade UNS S31803 Welded Pipe and seamlessly constructed ones as well. Testing is also an important parameter of these pipes. In addition to a nondestructive electric test, the ASTM A790 UNS S31803 Seamless Pipe is required to conform to the values of tension test, flattening tests, hydrostatic tests as well as a hardening test. Perfect impex is a large manufacturer and supplier of these pipes and we produce all kinds and variations of the product. The advantage to choose ASTM A790 Grade UNS S31803 Pipe manufacturer is to get 5 to 10% discount price compare to stockist and supplier in Mumbai and Prime quality material with Mill test Certificate.
Chemical Composition
| Grade | C | Si | Mn | P | S | Cr | Ni | Mo | N |
| UNS S32750 | 0.030 | 0.8 | 1.2 | 0.030 | 0.015 | 24.0-26.0 | 6.0-8.0 | 3.0-5.0 | 0.24-0.32 |
| UNS S31803 | 0.030 | 1.0 | 2.0 | 0.020 | 0.020 | 21.0-23.0 | 4.5-6.5 | 2.5-3.5 | 0.08-0.20 |
| UNS S31500 | 0.030 | 1.0 | 1.2-2.0 | 0.030 | 0.030 | 18.0-19.0 | 4.5-5.5 | 2.5-3.5 | 0.05-0.10 |
Physical Properties
| Grade | Y.S.MPa min | T.S.Mpa min | Elongation % | Hardness HRC |
| UNS S32750 | 550 | 800 | 15 | 20 |
| UNS S31803 | 450 | 620 | 25 | 20 |
| UNS S31500 | 440 | 630 | 30 | 20 |
YUHONG Quality Tests:
| Corrosion Test | Conducted only when specially requested by the client |
| Chemical Analysis | Test done as per required quality standards |
| Destructive / Mechanical Testing | Tensile | Hardness | Flattening | Flare | Flange |
| Reverse-bend and Re. flat tests | Carried out in full compliance with relevant standards & ASTM A-450 and A-530 norms, which ensures trouble-free expansion, welding & use at customers end |
| Eddy Current Testing | Done to detect homogeneities in subsurface by using Digital Flaw-mark Testing System |
| Hydrostatic Testing | 100% Hydrostatic Testing carried out according to ASTM-A 450 norms for checking tube leakage, and biggest pressure we can support 20Mpa/7s . |
| Air Under Pressure Test | To check any evidence of air leakage |
| Visual Inspection | After passivation, every single length of tubes & pipes is subjected to thorough visual inspection by trained staff for detecting surface flaws & other imperfections |
Supplementary Testing:
Apart from the above mentioned tests, we also carry out on the manufactured products supplementary testing. The tests conducted under this include:
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Duplex Stainless Steel Pipe Application:
Contact Person: Kelly Huang
Tel: 0086-18258796396
Fax: 0086-574-88017980
