UNS S31803 concentric reducers
ASTM A815 UNS S31803 Concentric Pipe Reducer in UAE
A concentric pipe reducer joins two pipe sections of different sizes while keeping a shared centerline. UNS S31803 duplex steel gives it excellent corrosion resistance in chlorides, acids and caustic solutions.
At a glance
- Grade: UNS S31803 (EN 1.4462)
- Microstructure: roughly equal austenite and ferrite
- Standard: ASTM A815 WP-S, WP-W
- Types: concentric, eccentric, butt weld, seamless, threaded
- Corrosion: resists pitting, crevice corrosion and stress corrosion cracking
- Testing: visual, dimensional and non-destructive
SA 815 S31803 Reducer Manufacturer in UAE
DuplexPipeline manufactures UNS S31803 concentric reducers in Mumbai for industrial piping and plumbing fittings.
| Parameter | Details |
| Material | UNS S31803 duplex stainless steel |
| Standard | ASTM A815 (WP-S, WP-W), SA 815 |
| Reducer types | Concentric, eccentric, weld, seamless, threaded |
| End connection | Butt weld |
| Schedule | Including Sch 80 |
| Surface finish | Polished |
| Supply | Made in India, shipped to the UAE and worldwide |
Why Choose a Concentric Pipe Reducer?
- Corrosion resistance: resists pitting, crevice corrosion and stress corrosion cracking
- Longevity: keeps pipes and fittings reliable across the piping system
- High strength: supports structural integrity and load-bearing needs
- Pressure capability: high tensile strength handles pressure in piping systems
- Material grade: meets Unified Numbering System (UNS) requirements
Types of SA 815 UNS S31803 Reducer
Concentric pipe reducer types we supply for UAE projects:
| Reducer type | Key details |
| Concentric butt weld reducer | Centered on the pipe axis, butt weld ends |
| Eccentric reducer | One side offset flat |
| Seamless reducer | Polished surface finish |
| Butt weld pipe reducer | Sch 80, used in heat exchangers |
| Weld reducer (SA815) | Welded construction |
| Threaded reducer | Threaded ends |
A815 S31803 butt weld reducer
- Size: 6″
- Reducer type: concentric
- End connection: buttweld
A815 UNS S31803 seamless reducer
- Surface finish: polished
- Head diameter: 4″
- Tensile Strength (Mpa): 515
A815 S31803 butt weld pipe reducer
- Schedule: Sch 80
- Application: heat exchangers
- Melting Range: 1400 ℃
Concentric Pipe Reducer vs Eccentric Reducer
| Feature | Concentric | Eccentric |
| Alignment | Stays centered on the axis | One side offset flat |
| Shape | Symmetrical taper | Asymmetrical taper |
| Use | Connects pipes of different sizes on a shared centerline | Keeps one side of the pipe level |
Specification of UNS S31803 Concentric Reducers
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 |
UNS S31803 Concentric Reducers Stock in Mumbai for the UAE
- Our UNS S31803 concentric reducers stock covers concentric, eccentric, seamless, butt weld and threaded types
- Variety of sizes and schedules, including Sch 80
- Premium quality for demanding piping systems
- Quick quotes available
- To check UNS S31803 concentric reducers stock for the UAE, send your large and small end sizes, schedule and quantity
Buy UNS S31803 Concentric Reducers in the UAE from DuplexPipeline
When you buy UNS S31803 concentric reducers from us, you get:
- Visual, dimensional and non-destructive testing
- Chemical and mechanical properties to review before purchase
- Quality assurance and worldwide shipping, including the UAE
How to order
- Share large end size, small end size, schedule and quantity
- Receive datasheet and quote
- Confirm the order
UNS S31803 Concentric Reducers Price
UNS S31803 concentric reducers price depends on:
| Factor | Effect |
| Size | Larger reducers use more material |
| Schedule and wall thickness | Thicker walls cost more |
| Type | Seamless and welded reducers are priced differently |
| Quantity | Larger orders can change the rate |
Request a quote for the latest UNS S31803 concentric reducers price in the UAE
- Buying from a direct manufacturer in India helps keep cost down
How Reducers Are Manufactured
- Form by hot forming or cold forming
- Machine to precise dimensions and smooth surfaces
- Apply additional finishing for the desired surface finish
- Test by visual inspection, dimensional checks and non-destructive testing
SA815 S31803 Weld Reducer
A815 S31803 Eccentric Reducer
ASTM A815 UNS S31803 concentric pipe reducer
Applications of UNS S31803 Concentric Reducers
| Use | Where |
| Industrial piping | Joining different pipe sizes |
| Plumbing fittings | Systems needing corrosion resistance and strength |
| Heat exchangers | Butt weld reducers in Sch 80 |
Temperature and Pressure Rating of a Concentric Pipe Reducer
- Operates up to about 250°C – 300°C (480°F – 570°F)
- Rating depends on size, wall thickness and design standard
- Check industry standards and our datasheet for exact ratings
Cryogenic Use
- Good toughness and stress corrosion cracking resistance at low temperatures
- Design must account for thermal contraction and brittle fracture risk
- Confirm impact test requirements before specifying for very low temperatures
Dimensions and Tolerances
| Item | What is checked |
| Outside diameter (OD) | Within specified tolerances |
| Center-to-end (C-to-E) | Overall length within tolerance limits |
| Wall thickness | Per the applicable standard |
Frequently Asked Questions
UNS S31803 concentric reducers — Questions Buyers Ask Most
What is a pipe reducer used for?
What's the difference between concentric and eccentric reducers?
Concentric: stays centered on the axis
Eccentric: offset on one side
Are UNS S31803 concentric reducers suitable for plumbing fittings?
What sizes are available for pipe tube concentric reducers?
Many sizes and schedules, including Sch 80, and sizes such as 6″
Can these reducers be used in cryogenic service?
They have good low-temperature toughness, but confirm design codes first
UNS is a grade designation and it implies that the steel product meets all the standard requirements of the Unified Numbering System UNS. The materials belonging to this UNS grade designation show excellent corrosion resistance in environments containing chlorides, acids and caustic solutions
UNS S31803 concentric reducers have high strength and are suitable for applications that require structural integrity and load-bearing capabilities. A815 UNS S31803 seamless reducer has a duplex microstructure consisting of approximately equal proportions of austenite and ferrite phases.
SA 815 S31803 reducer manufacturer in Ind
SA 815 UNS S31803 reducer is highly resistant to pitting, crevice corrosion, and stress corrosion cracking. This corrosion resistance provided by the reducers ensures the longevity and reliability of the piping system
These reducers have high strength which contributes to the overall structural integrity of the ASTM A182 S31803 eccentric reducer pipe fitting. The superior mechanical properties of the reducers including high tensile strength make them capable of withstanding high pressure in piping systems.
Check the availability of ASTM A815 UNS S31803 eccentric reducer size, and specifications and also receive quick quotes
SA815 S31803 Weld Reducer
A815 S31803 Eccentric Reducer
ASTM A815 UNS S31803 concentric pipe reducer
SA815 S31803 eccentric reducer can be formed using either hot forming or cold forming methods. After the forming process, the reducers may undergo machining operations to achieve precise dimensions and smooth surfaces.
The ASTM A815 S31803 eccentric weld reducer may also undergo additional finishing processes to achieve the desired surface finish. Lastly, manufacturers test and inspect the reducers through methods such as visual inspection, dimensional checks, and non-destructive testing.
Receive UNS S31803 reducers in a variety of sizes and premium qualities to meet your needs
Buy from S31803 butt weld reducer manufacturers in India to save cost
A815 S31803 butt weld reducer
- Size: 6″
- Reducer type: concentric
- End connection: buttweld
A815 UNS S31803 seamless reducer
- Surface finish: polished
- Head diameter: 4″
- Tensile Strength (Mpa): 515
A815 S31803 butt weld pipe reducer
- Schedule: Sch 80
- Application: heat exchangers
- Melting Range: 1400 ℃
View the chemical and mechanical properties of the A815 UNS S31803 seamless reducer before purchasing any quantity
A815 S31803 weld reducer exhibit good temperature and pressure capabilities mostly because of its excellent mechanical properties and corrosion resistance. These reducers can easily operate at temperatures up to around 250°C to 300°C or 480°F to 570°F without any cracking or failure.
Regarding pressure ratings, these reducers are commonly available in various pressure classes such as ANSI/ASME 150, 300, 600, 900, etc. The pressure rating of a reducer depends on its dimensions such as size and wall thickness and the applicable design standards.
A815 S31803 concentric pipe reducer is known for their resistance to stress corrosion cracking and excellent toughness, even at low temperatures. These properties make them well-suited for cryogenic applications, where materials need to withstand extremely low temperatures without losing their mechanical strength.
Cryogenic applications involve extremely low temperatures, often below -150°C or -238°F, and hence the reducers should be designed accordingly. The design considerations of the ASTM A815 WP-S UNS S31803 pipe reducer should include factors such as thermal contraction, and brittle fracture susceptibility.
The outside diameter (OD) of the ASTM A815 UNS S31803 butt weld reducer should be within the specified tolerances. The center-to-end (C-to-E) dimension which represents the overall length of the A815 S31803 butt weld pipe reducer must be within the given tolerance limits.
