ASTM A790/En10216-5 Uns S31803/S32205 Seamless Duplex Stainless Steel Pipe 22%Cr/5%Ni/3%Mo for Oil/Gas/Chemical

• Customization: Available
• After-sales Service: 24h Onilne Service
• Warranty: Third Party Inspection
• Model NO.: ASTM A790 / EN 10216-5 UNS S31803/S32205
• Type: Seamless
• Technique: Cold Drawn
• Material: Stainless Steel
• Surface Treatment: Polished
• Usage: Pipeline Transport, Boiler Pipe, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Food/Beverage/Dairy Products, Machinery Industry, Chemical Industry, Mining, Construction & Decoration, Special Purpose
• Section Shape: Round
• Standard: ASTM A213/A312/A268/A269/A790
• Grade: 304 304/304L 304h 321 321H 316 316L 316/316L 316h
• Skill: Cold-Drawn
• Od: 6~630mm
• Wt: 1~50mm
• Max Length: 25m
• Surface: Pickled, Bright Annealed, Polished
• Transport: Sea-Worthy Packing
• Application1: Oil Transportation, Power Station, Condenser
• Application2: Gas Transportation, Sugar Industry,Air-Conditioner
• Application3: Chemical Industry, Marine.Bridge Construction
• Application4: Dewatering Transport, Furniture, Water, Plumbing
• Application5: Searwater Desalination/Coal Mine/Decoration
• Delivery: 7-35 Days
• Package: Packed by Bundle, Plastic Bag, Wooden Cases etc.
• Transport Package: Sea Whorthy
• Specification: Seamless 1/2" To 24" Welded To 72"(DN8~DN1000)
• Trademark: EZS
• Origin: China

Product Description

Product Description

ASTM A790/EN10216-5 UNS S31803/S32205 Seamless Duplex Stainless Steel Pipe 22%Cr/5%Ni/3%Mo for Oil/Gas/Chemical

Product Parameters

Model NO.	Seamless Stainless Steel Pipe
Section shape	Round
Length	Customized by Client and Typically 6000mm
Material Grade	304 304/304L 304h 321 321H 316 316L 316/31L 316h
Specification	OD 6~630MM; WT 1.00~50mm
Origin	China
Production Capacity	1000 Tons/Month
Usage	Pipeline Transport, Boiler Pipe, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Construction & Decoration, Food/Beverage/Dairy Products, Machinery Industry, Chemical Industry, Mining, Special Purpose
Standard	ASTM A213/A312/A268/A269/A790 EN10213/10305, JIS3459  DIN17456/17458
Steel Grade	Nickel Alloy Pipe
Transport Package	Sea-Worthy Packing
Trademark	EZS
Our services:	We can customized  according  to customer's requriement or drawing ,packaging according  to customers' request

 

Product Overview

Our seamless duplex stainless steel pipes are manufactured in compliance with ASTM A790 and EN 10216-5 standards, offering exceptional strength, corrosion resistance, and durability in harsh environments. The UNS S31803 (2205) and S32205 duplex grades provide an optimal balance of austenitic and ferritic microstructure, making them ideal for oil & gas pipelines, chemical processing, marine, and offshore applications.

Key Features & Benefits

 High Corrosion Resistance - Excellent resistance to chloride stress corrosion cracking (SCC), pitting, and crevice corrosion (PREN ≥35).
 Superior Strength - Double the yield strength of standard 304/316 stainless steel, reducing material thickness and costs.
 Seamless Construction - No welds, ensuring higher pressure integrity and leak-proof performance.
 Wide Temperature Range - Suitable for -50°C to 300°C environments.
 Cost-Effective - Longer service life with lower maintenance compared to standard stainless steels.

 

Technical Specifications

1. Material Composition (UNS S31803 / S32205)

Element	Content (%)
Chromium (Cr)	21.0-23.0
Nickel (Ni)	4.5-6.5
Molybdenum (Mo)	2.5-3.5
Nitrogen (N)	0.08-0.20
Manganese (Mn)	≤ 2.0
Carbon (C)	≤ 0.03

2. Mechanical Properties

Property	Value
Tensile Strength	≥ 620 MPa
Yield Strength	≥ 450 MPa
Elongation	≥ 25%
Hardness (Rockwell B)	≤ 290 HB

3. Available Sizes & Dimensions

• Outer Diameter (OD): ½" (12.7mm) to 24" (610mm)

• Wall Thickness: SCH 10S, 40S, 80S, or custom

• Length: Standard 6m (20ft), or cut-to-length

4. Standards & Certifications

• ASTM A790 - Standard for seamless duplex stainless steel pipes.

• EN 10216-5 - European standard for pressure pipes.

• NACE MR0175/ISO 15156 - Compliant for sour service (HS environments).

• PED 2014/68/EU - Pressure Equipment Directive certified.

 

Applications

 Oil & Gas - Subsea pipelines, downhole tubing, risers.
 Chemical Processing - Acid storage, heat exchangers, reactors.
 Desalination Plants - Seawater handling, brine heaters.
 Power Generation - Condensers, boiler feed systems.
 Marine & Offshore - Shipbuilding, offshore platforms.

About EZ STEEL Group

 

Detailed Photos


Workshop Equipment

Production Process


Detecting Department
Packaging & Delivery


Global Business Main Customers


Certificates

FAQ

Q:  How many days can you deliver after confirmed the order?
A:  For stock:  within 5-7 days;
      For customized product:  around 30 days;
      For special sizes:  subject to negotiation.

Q: How does your company do quality control?
A: ISO 9001:2015 certified;
     Product certificate as per EN10204 3.1 or 3.2 as per customer's request.
    
  
Q: Can I have a factory-visit?
A:  Surely. All customers are welcome to visit us in China.

Q: Can I have a trial order?
A: Of course, it is an honor for us to have the opportunity to show our quality and service. 
 

Company Profile

	Business Type:	Manufacturer/Factory
	Main Products:	Carbon Steel Pipe , Stainless Steel Pipe , Copper Nickel Tube , Heat Exchanger Tube , Boiler ...
	Registered Capital:	2000000 RMB
	Plant Area:	>2000 square meters
	Management System Certification:	ISO 9001, ISO 14001, OHSAS/ OHSMS 18001, ANSI/ESD
	Average Lead Time:	Peak Season Lead Time: 1-3 months Off Season Lead Time: within 15 workdays

SGS Serial NO. :

QIP-ASI199413Report Verification

EZ STEEL INDUSTRIAL Co., Ltd, together with LONG-RUN METALS Co., Ltd, is the export division and window company of EZ STEEL GROUP, which was founded in 1996 and has been committed to the development and manufacturing of industrial tubes in the past 20 years. It is one of the largest steel tube manufacturing enterprise groups in China. The group possess fixed assets over 200million and more than 800 employees with annual production capacity over 300 thousand tons.

The company has continuously introduced the world advanced manufacturing equipment and now is able to produce welded and seamless steel tube, copper tube and nickle alloy tube. We also have our own coating facilities and workshops for further processing. After years of development, EZ STEEL GROUP and the affiliated enterprises have obtained many kinds of domestic and international certifications including ISO 9001 Quality Management System Certification, ISO14000 Environment Management System Certification, CE, License for Manufacture of Pressure Piping in China, etc. The company has obtained good domestic achievements and is the nominated supplier of CNPC and CNOOC. The product are exported to Southeast Asia, the Middle East and Africa, Europe, Australia, North and Latin Americas via trade companies, and are widely used in pipeline works, foundation works, steel structure works, boiler and condenser fabrication, oil refinery plant, power plant, sugar-making plant, ship-building and offshore construction projects etc.

Holding the concept of First-class Brand, First-class Service, First-class Value, EZ STEEL GROUP is aiming to build up a win-win enterprise platform for both our customers and employees.

CONTACT US
Contact: Rosy Xu
EZ STEEL INDUSTRIAL CO., LTD
Add: No.199,  Xiangfu Road, Yuhua Industrial Zone, Changsha City , P.R China 

Pls. do not hesitate to contact me if you have any questions!

You are warm welcomed to visit our factory!!!

Thank you for visiting our products & Looking forward to hearing from you!