UNS S31803 socket weld flange
Industrial UNS S31803 Socket Weld Flanges Dealer in Oman
A socket weld pipe fitting has a socket-shaped recess on the inner diameter. The pipe is inserted into the recess and then welded. UNS S31803 duplex steel keeps this compact, low-profile joint reliable under high-pressure fluids and gases.
At a glance
- Grade: UNS S31803 (EN 1.4462)
- Design: compact, low-profile socket joint
- Pressure classes: 150 – 2500
- Face types: RTJ, RF
- Sizes: 1/2″ – 48″
ASTM A182 UNS S31803 SWRF Flange Manufacturer in Oman

DuplexPipeline manufactures UNS S31803 socket weld flanges in Mumbai for high-pressure piping.
| Parameter | Details |
| Material | UNS S31803 duplex stainless steel |
| Size range | 1/2″ – 48″ |
| Pressure class | 150 – 2500 |
| Face types | RTJ, RF |
| Types | Socket weld pipe flanges, SWRF |
| Supply | Made in India, shipped to the Oman and worldwide |

ASTM A815 WP-W flat socket weld flange

SA 815 UNS S31803 socket weld pipe flanges

A815 S31803 counter bore socket weld flange
Why Use a Socket Weld Pipe Fitting?
- Secure joint: handles high-pressure fluids and gases reliably
- Compact design: low profile compared to other flange types
- Counter bore option: pipe inserts deeper into the flange
- Easier alignment: the larger welding area speeds up fit-up
- Lower cost: saves time and labour during welding
- Fewer failures: reliable forged flanges reduce failure risk and related costs
Types of Socket Weld Flanges
Socket weld pipe fitting types we supply for Oman projects:
| Flange type | Key details |
| Flat socket weld (WP-W) | Flat sealing face |
| Socket weld pipe flange (SWRF) | Pressure class 150 – 2500, faces RTJ and RF |
| Counter bore socket weld | Deeper pipe insertion, easier alignment |
| Forged socket weld | Forged for strength, oil varnished coating |
| Reducing socket weld | Connects different pipe sizes |
| SWRF blind | Closes pipe ends |

SA 815 s31803 socket flanges
- Elongation: 50mm
- Size: 1/2″ – 48″
- Application: airpspece

1.4462 UNS S31803 socket weld rf flange
- Pressure class: 150 – 2500
- Type: socket weld pipe flanges, swrf
- Face type: Rtj, RF

A815 UNS S31803 socket weld forged flange
- Coating: oil varnished
- Yield Strength: 290 MPa
- Tensile Strength: 415 MPa
Specification of UNS S31803 Socket Weld Flanges

Chemical composition (%)
| Element | % |
| Carbon (C) | 0.030 max |
| Manganese (Mn) | 2.00 max |
| Silicon (Si) | 1.00 max |
| Phosphorus (P) | 0.030 max |
| Sulphur (S) | 0.020 max |
| Chromium (Cr) | 21.0 – 23.0 |
| Nickel (Ni) | 4.5 – 6.5 |
| Molybdenum (Mo) | 2.5 – 3.5 |
| Nitrogen (N) | 0.08 – 0.20 |
Mechanical properties
| Property | Value |
| Tensile strength | 620 MPa min |
| Yield strength | 450 MPa min |
| Elongation | 25% min |
| Hardness | 293 HB max |
Equivalent grades
| Standard | Designation |
| UNS | S31803 / S32205 |
| EN / DIN | 1.4462 |
| Common name | Duplex 2205 |
UNS S31803 Socket Weld Flanges Stock in Mumbai for the Oman
- Our UNS S31803 socket weld flanges stock covers flat, SWRF, counter bore, forged, reducing and blind types
- Pressure classes 150 – 2500
- Face types: RTJ and RF
- Hydrostatic testing available to verify strength and leak resistance
- To check UNS S31803 socket weld flanges stock for the Oman, send your type, size, class and quantity
Buy UNS S31803 Socket Weld Flanges in the Oman from DuplexPipeline
When you buy UNS S31803 socket weld flanges from us, you get:
- Factory-price supply from Mumbai
- Hydrostatic and NDT testing
- Quality assurance and worldwide shipping, including the Oman
How to order
- Share type, size, pressure class and quantity
- Receive datasheet and quote
- Confirm the order
Pressure Rating of a Socket Weld Pipe Fitting
- Pressure classes: 150, 300, 600, 900, 1500 and 2500
- Rating depends on class, operating pressure and material properties
- Check the manufacturer documentation for the exact rating of your flange
Manufacturing Process of a Socket Weld Pipe Fitting
- Cut raw material to size and shape for the flange dimensions
- Heat the cut blanks to improve workability
- Forge the flange
- Machine to required dimensions, tolerances and surface finish
- Machine a bevelled edge on the socket weld portion
Quality Tests
| Test | What it checks |
| Visual inspection | Surface defects |
| Liquid penetrant testing | Surface defects made visible by a penetrant liquid |
| Magnetic particle testing | Surface and near-surface defects |
| Ultrasonic testing | Internal flaws, using high-frequency sound waves |
| Hydrostatic testing | Strength and leak resistance |
Coating Options
- Oil varnish
- Fusion-bonded epoxy: thermosetting polymer coating
- Zinc coatings: hot-dip galvanizing or zinc electroplating for sacrificial protection
Our Products
- Duplex pipe
- Duplex tube
- Super duplex pipe
- Super duplex tube
- Duplex heat exchanger tubes
- Super duplex heat exchanger tubes
- Duplex plate
- Super duplex plate
- Duplex pipe fittings
- Super duplex pipe fittings
- Duplex steel flanges
- Super duplex flanges
- Duplex round bar
- Super duplex round bar
- Duplex steel fasteners
- Duplex 2205 pipe
- Super duplex 2507 pipe
- Super duplex 2507 flanges
- ASTM A789 UNS S31803 seamless tube
- ASTM A790 UNS S31803 seamless pipe
- UNS S31803 concentric reducers
- UNS S31803 elbow
- UNS S31803 tee
- UNS S31803 end cap
- UNS S31803 Slip on Flange
- UNS S31803 lap joint flange
- UNS S31803 socket weld flange
Frequently Asked Questions
UNS S31803 socket weld flange — Questions Buyers Ask Most
What is a socket weld pipe fitting used for?
How is a socket weld pipe fitting rated for pressure?
By pressure class, from 150 to 2500. Exact ratings depend on size, class and material
What makes duplex steel flanges different?
Austenite and ferrite phases give higher strength and better corrosion resistance.
Are you a flange manufacturer in India supplying the Oman?
Yes, we manufacture and supply UNS S31803 socket weld flanges from Mumbai
What coatings are used on socket weld flanges?
Oil varnish, fusion-bonded epoxy and zinc coatings.
What sizes are available for UNS S31803 socket weld flanges?
1/2″ to 48″, pressure classes 150 to 2500.
Key features of UNS S31803 Socket weld fanges for secure connections
These flanges have a socket-shaped recess on the inner diameter where the pipe is inserted and then welded. UNS S31803 socket weld flange has a compact and low-profile design compared to other flange types. The socket weld joint provides a secure connection, allowing the flange to handle high-pressure fluids or gases.
ASTM A182 UNS S31803 SWRF flange manufacturer in India

Maximum pressure ratings of A815 S31803 Reducing socket weld flanges
The pressure rating of an ASTM A815 UNS S31803 SORF flange is typically specified in pressure classes such as 150, 300, 600, 900, 1500, or 2500. For class 150, the pressure rating of the flange is 3,000 psi and when it comes to class 2500, the rating is 108,000 psi.
Some additional factors that can affect the maximum pressure rating of a flange are operating pressure and material properties. To obtain the accurate maximum pressure rating for an ASTM A815 WP-S UNS S31803 SW flanges, refer to the manufacturer’s documentation.
Buy A815 S31803 reducing socket weld flange at factory price in Mumbai, we provide hydrostatic testing to verify their strength and leak resistance

ASTM A815 WP-W flat socket weld flange

SA 815 UNS S31803 socket weld pipe flanges

A815 S31803 counter bore socket weld flange
NDT methods for quality assurance of A815 S31803 socket weld flanges
Visual inspection involves a visual examination of the A815 S31803 reducing socket weld flange for any surface defects. The liquid penetrant testing method entails applying a liquid penetrant to the surface of the flange to make the defects visible
The magnetic particle testing technique is used for detecting surface and near-surface defects in SA 815 s31803 socket flanges. Ultrasonic testing utilizes high-frequency sound waves to detect internal flaws in the 1.4462 UNS S31803 socket weld rf flange.
Check pressure rating, standard and dimensions of SA 815 UNS S31803 socket weld pipe flanges
Specification of UNS S31803 Socket weld Flange

Know more about A815 S31803 counter bore socket weld flang, see different types of coatings applied to SA A182 socket weld flat face flange
Types of ASTM A815 UNS S31803 socket weld flange

SA 815 s31803 socket flanges
- Elongation: 50mm
- Size: 1/2″ – 48″
- Application: airpspece

1.4462 UNS S31803 socket weld rf flange
- Pressure class: 150 – 2500
- Type: socket weld pipe flanges, swrf
- Face type: Rtj, RF

A815 UNS S31803 socket weld forged flange
- Coating: oil varnished
- Yield Strength: 290 MPa
- Tensile Strength: 415 MPa
Find complete information about ASTM A815 WP-W flat socket weld flange mechanical and equivalent properties
Mechanical composition of A182 UNS S31803 socket weld orifice flange

Equivalent properties of 1.4462 UNS S31803 reducing socket weld flange

Manufacturing process of ASTM A815 WP-W flat socket weld flanges
The manufacturers cut the raw material into appropriate sizes and shapes based on the flange dimensions. Then, the manufacturer heats the cut blanks to improve the workability of the ASTM A815 WP-W flat socket weld flange.
After forging, the formed flanges undergo machining operations to achieve the required dimensions, tolerances, and surface finish. The socket weld portion of the SA 815 UNS S31803 socket weld pipe flanges is prepared by machining a bevelled edge.
Cost Benefits of A815 S31803 Counter Bore Socket Weld Flanges Over Alternatives
A815 S31803 counter bore socket weld flange has a counter bore feature that allows the pipe to be inserted deeper into the flange. The larger welding area facilitates easier alignment during the welding process which can save time and labor expenses. The reliability and durability of the A815 UNS S31803 socket weld forged flange reduce the likelihood of failures and associated costs.
Coating Types Used on ASTM A815 UNS S31803 SWRF Blind Flanges
Fusion-bonded epoxy coating is a thermosetting polymer coating applied to the ASTM A815 UNS S31803 swrf blind flange. Zinc coatings such as hot-dip galvanizing or zinc electroplating provide corrosion protection through sacrificial cathodic action to the flange.
Our products
- Duplex pipe
- Duplex tube
- Super duplex pipe
- Super duplex tube
- Duplex heat exchanger tubes
- Super duplex heat exchanger tubes
- Duplex plate
- Super duplex plate
- Duplex pipe fittings
- Super duplex pipe fittings
- Duplex steel flanges
- Super duplex flanges
- Duplex round bar
- Super duplex round bar
- Duplex steel fasteners
- Duplex 2205 pipe
- Super duplex 2507 pipe
- Super duplex 2507 flanges
- ASTM A789 UNS S31803 seamless tube
- ASTM A790 UNS S31803 seamless pipe
- UNS S31803 concentric reducers
- UNS S31803 elbow
- UNS S31803 tee
- UNS S31803 end cap
- UNS S31803 slip on flange
- UNS S31803 socket weld flange
- UNS S31803 lap joint flange
- Duplex Pipeline
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