ASTM A234 WPB Concentric Reducer ASME B16.9 NACE MR 0175
ASTM A234 WPB concentric reducers are carbon steel butt weld pipe fittings designed to provide a smooth and gradual transition between different pipe diameters. Manufactured in accordance with ASME B16.9, these reducers ensure uniform flow, reduced turbulence, and minimal pressure loss in piping systems.
Widely used in oil & gas, petrochemical, power generation, and industrial pipelines, WPB concentric reducers offer excellent strength, weldability, and cost efficiency for medium temperature and pressure applications.
C&N is a professional A234 WPB pipe fittings & flange manufacturer in China,
Concentric Reducer Specification
| Type | Reducer |
| Size | Seamless Reducer:1/2″~24″ DN15~DN600 Welded Reducer: 1/2″~100″ DN15~DN2500 |
| Wall thickness | sch10, sch20, sch30, std, sch40, sch60, xs, sch80, sch100, sch120, sch140, sch160, xxs, std,sch5s, sch20s, sch40s, sch80s |
| Standards | ANSI B16.9,MSS SP-95, GOST 17375,DIN2566,JIS |
| Material | Carbon steel: ASTM/ASME A234 WPB,WPC Alloy steel: ASTM/ASME A234 WP 9-WP 12-WP 11-WP 22-WP 5-WP 91-WP 91 Stainless steel: ASTM/ASME A403 WP 304-304L,WP 316-316L,WP 321 Low-temperature steel: ASTM/ASME A402 WPL 3-WPL 6 High performance: ASTM/ASME A860 WPHY 42-46-52-60-65-70 |
| Surface treatment | Transparent oil, rust-proof black oil or hot galvanized |
| Packing | wooden case, pallet or as customers’ requirement |
| Applications | Petroleum, chemical, power, gas, metallurgy, shipbuilding, construction, etc |
Concentric vs Eccentric Reducer
- Concentric Reducer:
Maintains centerline alignment, used in vertical pipelines - Eccentric Reducer:
Offset design, used in horizontal pipelines to avoid air accumulation
Choosing the right type improves system efficiency and safety.
ASTM A234 WPB chemical composition:
| Chemical composition of ASTM A234 WPB PIPE FITTINGS | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Grade | C | Mn | P max | S max | Si | Cr | Mo | Ni | Cu | Others |
| WPB | 0.30 max |
0.29-1.06 | 0.050 | 0.058 | 0.10 min |
0.40 max |
0.15 max |
0.40 max |
0.40 max |
V 0.08 max |
Mechanical Properties
| Property | Typical Requirement |
|---|---|
| Tensile Strength | 415 – 585 MPa |
| Yield Strength | ≥ 240 MPa |
| Elongation | ≥ 20% |
Inspection & Testing
- PMI (Positive Material Identification)
- UT / RT / MT / PT (NDT)
- Dimensional inspection
- Visual inspection
- Third-party inspection (SGS, BV, TUV, DNV)
How to order our A234 WPB REDUCER?
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ASTM A234 WPB concentric reducers manufactured to ASME B16.9 provide a reliable and economical solution for diameter transitions in pressure piping systems.
With smooth flow characteristics, excellent weldability, and wide size availability, WPB concentric reducers are a standard choice for industrial pipeline projects worldwide.
FAQ
Q1: What is ASTM A234 WPB concentric reducer used for?
A: It is used to connect pipes of different diameters in vertical piping systems, ensuring smooth flow and reduced pressure loss.
Q2: What is the difference between concentric and eccentric reducer?
A: Concentric reducers maintain centerline alignment, while eccentric reducers are used in horizontal pipelines to prevent air pockets.
Q3: Are WPB reducers suitable for oil and gas applications?
A: Yes, ASTM A234 WPB reducers are widely used in oil & gas pipelines due to their strength and weldability.
Related Products
-
ASTM A234 WPB Eccentric Reducers
-
ASTM A234 WPB Elbows (45°, 90° LR / SR)
