Stainless Steel Seamless Pipe ASTM A790 Available in Duplex Uns31803 1/4" Nominal Bore up to 8"

• Type: Stainless Steel Pipes
• Standard: ASTM, AISI, GB, JIS, DIN, EN
• Grade: 300 Series
• Certification: ISO, RoHS, IBR, AISI, ASTM, GB, EN, DIN, JIS
• Shape: Round
• Technique: Seamless/Welded
• Surface Treatment: Bright, Pickling ,Polishing,Annealing,etc.
• Place of Origin: Zhejiang China
• Alloy or Not: Is Alloy
• Delivery Time: 8-14 Days
• Model Number: 304, 304L, 201, 316, 316L, 321, 317L, 309S, 310S,
• Application: Construction, Decorative, etc.
• Welding Line Type: ERW
• Processing Service: Bending, Welding, Punching, Decoiling, Moulding, C
• Item: 304 Inox Steel Tubing Steel Pipe
• Keyword: Stainless Steel Pipe
• Length: 5.8m, 6m, 8m, 11.8m or as Required.
• Used: Production Equipment and Lines for Food, Beverages
• Transport Package: According to Customer Requirements
• Specification: OD 6mm-5000mm
• Trademark: FLK
• Origin: Wenzhou, Zhejiang, China
• HS Code: 7304419000
• Production Capacity: 5000000pieces/Year

Product Description

Product Description

The "Stainless Steel Seamless Pipe ASTM A790 Available in Duplex UNS31803 1/4" Nominal Bore up to 8"" refers to a high-grade stainless steel pipe that conforms to the ASTM A790 specification. This pipe is made from Duplex UNS31803 stainless steel, known for its excellent strength and corrosion resistance properties. Here's a detailed analysis of its features, specifications, and potential applications:

1. Material Specification - Duplex UNS31803:

   • Duplex Stainless Steel: This type of steel is called "duplex" because it has a two-phase microstructure consisting of grains of ferritic and austenitic stainless steel. Duplex stainless steel like UNS31803 combines favorable qualities of both types: the strength and toughness of ferritic phases with the corrosion resistance of austenitic.
   • UNS31803: Specifically, this designation refers to a grade of duplex stainless steel that offers high resistance to pitting and chloride stress corrosion cracking. It typically contains around 22% chromium, 5% nickel, and 3% molybdenum.

2. ASTM A790 Specification:

   • ASTM A790: This standard specification covers seamless and straight-seam welded ferritic/austenitic (duplex) stainless steel pipe intended for general corrosive service, with particular emphasis on resistance to stress corrosion cracking.
   • Seamless Pipe: The pipes under this specification are seamless, meaning they are made from a solid round steel billet which is heated and pushed or pulled over a form until the steel is shaped into a hollow tube. This method avoids any seams or welds, which can be areas of weakness in pipes.

3. Sizes and Dimensions:

   • 1/4" Nominal Bore to 8": The pipe is available in a range of sizes starting from a nominal bore of 1/4 inch up to 8 inches. This size range covers a broad spectrum of applications, from small lines on machinery to major pipelines in industrial installations.

4. Applications:

   • Chemical Processing: Duplex stainless steel is particularly suited for handling corrosive chemicals, especially those used in the pulp and paper, textile, and oil and gas industries.
   • Desalination Plants: The resistance to chloride and seawater makes it ideal for use in desalination plants, which process large volumes of seawater.
   • Marine Applications: Its strength and corrosion resistance are beneficial in harsh marine environments.
   • Petrochemical and Refineries: Suitable for piping that must withstand harsh substances and high pressures.

5. Advantages:

   • Corrosion Resistance: Excellent resistance to a wide range of chemical environments, including chlorides, sulfides, and acids.
   • Strength: Higher strength leading to possibilities for using thinner pipe, thus reducing weight and cost.
   • Durability: Long life expectancy due to its ability to withstand environmental and chemical stressors.

6. Considerations for Installation and Use:

   • Welding and Fabrication: While duplex stainless steels can be welded, they require careful heat control to preserve the balanced microstructure. Proper welding techniques are crucial.
   • Cost: Duplex stainless steel can be more expensive than common grades of stainless steel due to its high nickel and molybdenum content.

Overall, the "Stainless Steel Seamless Pipe ASTM A790 Available in Duplex UNS31803" is highly suitable for demanding applications where strength and corrosion resistance are paramount. Its range of sizes and the robust nature of its construction make it a versatile choice for many industrial sectors.

Product Parameters

1.	Item	316L Seamless Tube ASTM A269 Cold drawn & Hot Finished seamless tube Seamless Pipe ASTM A312, 316L
2.	Standard	ASTM A213, A312, ASTM A269,ASTM A778, ASTM A789, DIN 17456,DIN 17457, DIN 17459, JIS G3459, JIS G3463, GOS T9941, EN 10216, BS3605, GB13296,etc.
3.	Material	201,202,301,304,304L,304N,XM21,304LN,309S,310S,316,316Ti, 316L,316N,316LN,317,317L,321,329,etc.
4.	Specifications	Wall thickness	1.0-150mm(SCH10S-XXS)
		Outside diameter	3.0-2500mm(1/8"-100")
		Length	6m,5.8m,8m,11.8m,12m or as required.
5.	Surface	Pickling, annealing, polishing, bright, sand blast, hair line, etc.
6.	Price Term	Ex-work, FOB, CFR, CIF, or as required.
7.	Payment Term	T/T, L/C, Western Union.
8.	Export to	Singapore, Canada, Indonesia, Korea, USA, UK, Thailand, Saudi Arabia, Vietnam, Iran, India, Peru, Ukraine ,Brazil, South Africa, etc.
9.	MOQ	500kg
10.	Delivery Time	Prompt delivery or according to order's quantity.
11.	Package	Export standard package: bundled wooden box, suit for all kinds of transport, or be required.
12.	Application	widely used in petroleum, chemical, medical, food, light industry, machinery, instrument and other industrial pipeline and mechanical structure parts, etc.
13.	Contact	If you have any question, please feel free to contact me.

Chemical Composition

 

Stee Grade	Chemical Composition %
	C	Cr	Ni	Mn	P	S	Mo	Si	Cu	N	Other
201	≤0.15	16.00-18.00	3.50-5.50	5.50-7.50	≤0.060	≤0.030		≤1		≤0.25
202	≤0.15	17.00-19.00	4.00-6.00	7.50-10.00	≤0.060	≤0.030		≤1		≤0.25
301	≤0.15	16.00-18.00	6.00-8.00	≤2.0	≤0.065	≤0.030		≤1.00
302	≤0.15	17.00-19.00	8.00-10.00	≤2.00	≤0.035	≤0.030		≤1.00
304	≤0.08	18.00-20.00	8.00-11.00	≤2.00	≤0.045	≤0.030		≤1.00
304L	≤0.035	18.00-20.00	8.00-12.00	≤2	≤0.045	≤0.030		≤1.00
305	≤0.12	17.00-19.00	11.00-13.00	≤2	≤0.045	≤0.03	Om	≤1.00
309S	≤0.08	22.00-24.00	12.00-15.00	≤2	≤0.045	≤0.030		≤1
310S	≤0.08	24.00-26.00	19.00-22.00	≤2	≤0.045	≤0.030		≤1.00
316	≤0.08	16.00-18.00	10.00-14.00	≤2	≤0.045	≤0.030	2.00-3.00	≤1.00
316L	≤0.035	16.00-18.00	10.00-14.00	≤2.00	≤45	≤0.03	2.00-3.0	≤1.00
317	≤0.08	18.00-20.00	11.00-14.00	2.00	≤0.045	≤0.030	3.00-4.00	≤1
317L	≤0.035	18.00-20.00	11.00-15.00	≤2.00	≤0.045	≤0.030	3.00-4.00	≤1.00
321	≤0.08	17.00-19.00	9.00-12.00	≤2	≤0.045	≤0.030		≤1.00			Ti5(C%-0.02 ~0.08
347	≤0.08	17.00-19.00	9.00-13.00	≤2.00	≤0.045	≤0.030		≤1.00			Nb≥10*C%

 

 

Product & Application

 

 

   Application of welded steel pipe,seamless steel pipe, cold hot rolled round pipe, and stainless steel pipe: construction material, buidlings, bridges, building decoration, chemical industry, car mainfold, water supply, petroleum pipeline, water pipe,boiler pipe, automobile pipe,hydraulic, building and equipment, pipeline