| After-sales Service: | Yes |
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| Warranty: | Yes |
| Type: | Seamless |
| Technique: | Hot Rolled |
| Material: | Alloy Steel |
| Surface Treatment: | Black |
| Samples: |
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GB 5310 steel pipe is applicable to steam boilers and pipeline seamless pipes for the manufacture of high pressure and above.The steel tubes shall be delivered in a heat treated condition.
Standard:GB 5310
Seamless steel tubes and pipes for high pressure boiler
GB 5310 standard is applicable to steam boilers and pipeline seamless pipes for the manufacture of high pressure and above.
GB 5310 12Cr2MoG Seamless steel tubes and pipes for high pressure boiler.
Manufacturing methods
(1)Steel smelting method
GB 5310 12Cr2MoG steel will be smelted by electric furnace plus furnace refining, oxygen converter plus furnace refining or electroslag remelting method.
(2)Manufacturing methods and requirements for tube blanks
The tube blank can be produced by continuous casting, die casting or hot rolling (forging).
(3)Manufacturing method of steel tube
GB 5310 12Cr2MoG Steel tubes shall be manufactured by hot rolling (extrusion, expansion) or cold drawing (rolling).
Heat treatment for GB 5310 12Cr2MoG High Pressure Boiler Tubes
| Grade | Heat treatment |
| 12Cr2MoG | 980 ºC~1 020 ºC,Normalizing,980 °C ~ 1 020 °C normalizing, when the wall thickness is greater than 30 mm, forced cooling; 720 °C ~ 760 °C tempering. |
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Product name
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Chinese seamless steel pipe GB5310 12Cr2MoG Alloy tube for high pressure boiler
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Outer diameier
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20mm-720mm
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Material
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Q355B/C/D/E,20Cr,40Cr,27SiMn,35CrMo,42CrMo,20CrMnMo,4130,4140,15MoG,12CrMoG,15CrMoG,12Cr1MoVG,SA106A/B/C,SA192,T1/T1a,SA210A1/C,T/P2,T/P11,T/P12,T/P22,T/P91...
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Standard
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GB8162/GB8163/GB3087/GB5310/GB9948/GB6479/ASTM A53a.b/ASTM A106b.c/ASTM A179/ASTM A519/JIS STPG370/STPG340/DIN/EN
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Tolerance daily standard
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od: +-1%, weight: +-10%
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Check
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ISO9001
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Package
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Standard seaworthiness packing or as required.
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MOQ
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1 metric tons, sample order accepted
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Shipping time
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7-10 working days after receipt of deposit or letter of credit
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Payment method
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3O%TT+7O%TT/LCEtc
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Describe
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Shot blasting derusting,paint,oil,galvanized
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The application
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1. Medium and low pressure fluid transmission pipeline
2. The casing
3. The boiler tube
4. Oil and gas industry
5. Chemical industry
6. Power indusrry
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Advantage
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1.Reasonable price, good quality
2.Sufficient inventory, fast delivery
3. Rich export experience and sincere service
4. Reliable freight forwarders
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Testings
(1)Hydraulic test
The steel pipe shall be hydraulically tested one by one, and the eddy current testing can instead of the hydraulic test.
(2)Flattening test
Steel pipes with an outer diameter greater than 22 mm to 400 mm and a wall thickness not greater than 40 mm shall be subjected to a flattening test.
(3)Bending test
Steel pipes with an outer diameter greater than 400 mm or a wall
(4)Flaring test
The steel pipe with an outer diameter of not more than 76 mm and a wall thickness of not more than 8 mm can be used for the flare test.
(5)Low-power test
Steel pipes should be tested at low magnification. Visually visible white spots, inclusions, subcutaneous bubbles, tumbling and delamination are not allowed on the cross-section acid immersion test piece.
(6) Non-metallic inclusions
Steel pipes shall be tested for non-metallic inclusions.
(7)grain size
The finished steel pipe should be tested for grain size.
(8)Microstructure
The finished steel pipe with the grades 15MoG will be ferrite plus pearlite, allowing the presence of granular bainite, and no phase change critical temperature between AC1 and AC3 is allowed.
Complete phase change product (such as yellow bar martensite); the finished steel pipe of grade 12Cr1MoVG allows the presence of sorbite;
(9)Decarburization layer
Cold drawn (rolled) finished steel pipes with an outer diameter of not more than 76 mm shall be inspected for the total decarburization layer.
(10)Non-destructive testing
The steel pipe shall be ultrasonically inspected and tested in accordance with the provisions of GB/T 5777.
Surface quality
The inner and outer surfaces of steel pipes do not have cracks, folds, crusting, rolling and separation. These defects shall be completely removed and the depth of defect removal shall not exceed 10% of the wall thickness. The actual outer diameter and wall thickness of the defect removal shall not be less than the minimum allowable for the outer diameter and wall thickness.
Applied to superheater, reheater, heat exchange tube and other boiler tubes.
Our company was established in 2012, is a comprehensive company integrating industry and trade. The company has successively won the honorary titles of provincial integrity enterprise and municipal excellent enterprise. We are mainly engaged in various metal related products. Such as pipes, pipe fittings, rods, coils, profiles, medium and heavy plates, narrow strips and other types of materials. The warehouse has a variety of products of different specifications and materials, and the capacity is maintained at 30,000-50,000 tons/month. Products are widely used in petroleum, chemical, electric power, coal, machinery, high and low pressure boiler tubes, hydraulic props, ships and other industries. We make full use of the advantages of self-operated export rights and enter the international market. Our customers are located in South Korea, Canada, Iran, Pakistan, Indonesia, Vietnam, South America and other countries, and we have offices in Indonesia and Vietnam. The quality of our products is enjoyed at home and abroad. high reputation. We adhere to the business philosophy of "integrity service, win-win cooperation, customer first", and provide one-stop steel solutions for global customers. Welcome friends from all over the world to visit our company. We are looking forward to establishing business relationships and personal friendships with you.
Q:How do you control quality?
A:Mill test certification is supplied with shipment,third party inspection is avaliable.
Q:What are the advantages of your company?
A:We have many professionals,technical personnel,more competitive prices and best after-sales service than other stainless steel companies
Q:How many coutries you already exported?
A:Exported to more than 50 countries mainly from Arab, Kuwait, Egypt, Turkey, Jordan, Brazil, India, Indonesia, Korea, etc
Q:Can you provide sample?
A:Small sample in store and can provide the sample for free.Customized samples will take about 5-7days
Q:Why should you buy from us not from other suppliers?
A:Diversified products, direct supply from manufacturer.
Q:What is your terms of payment ?
A:we accept T/T ,L/C ,D/A,D/P, Western union, paypal ,The payment method can be negotiated by both parties according to the actual situation.
Please Please leave your enquiry in the message box at the bottom of the product page and click SEND, we will contact you as soon as possible!
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