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Eccentric Reducers
Eccentric Reducers are critical pipeline components designed to reduce the pipe size while keeping one side of the fitting flat. This unique geometry ensures that the bottom (or top) of the pipeline remains level, facilitating complete drainage and preventing cavitation, especially near pump suction lines.
Moksh Tubes & Fittings LLP is a trusted manufacturer, supplier, and exporter of Eccentric Reducers in India, supplying premium-quality fittings conforming to ASME B16.9 and MSS-SP-43 standards. Our products are widely supplied to Indian projects and Gulf / GCC countries including UAE, Saudi Arabia, Qatar, Oman, and Kuwait.
Manufactured using advanced hot-forming and cold-forming processes, our seamless and welded eccentric reducers offer excellent mechanical strength, corrosion resistance, dimensional accuracy, and long service life, even in extreme high-pressure operating conditions.
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SPECIFICATIONS
| Category | Details |
|---|---|
| Material | Stainless Steel, Duplex & Super Duplex Steel, Nickel Alloys, Inconel, Monel, Titanium, Copper Alloys, Alloy Steel, Carbon Steel |
| Size Range | 1/2" NB to 48" NB (Seamless up to 24", Welded 8" to 48") |
| Thickness | Schedule 5S, 10S, 20S, S10, S20, S30, STD, 40S, S40, S60, XS, 80S, S80, S100, S120, S140, S160, XXS |
| Type | Seamless, Welded, Fabricated |
| Form | Eccentric (Offset) Reducer |
| Finishes | Shot Blasted, Black Paint, Anti-Rust Oil, Galvanized |
| Standards | ASME B16.9, MSS-SP-43, EN 10253, DIN 2616 |
| Applications | Pump Suction Lines, Oil & Gas Processing, Chemical Plants, Horizontal Piperacks |
Eccentric Reducers Size & Weight Chart
Schedule 10C Size & Weight Chart
| NPS (Large x Small) | Large End OD (mm) | Small End OD (mm) | Length (L) (mm) | Approx Weight (kg) |
|---|---|---|---|---|
| 1" x 1/2" | 33.4 | 21.3 | 51 | 0.12 |
| 1-1/2" x 1" | 48.3 | 33.4 | 64 | 0.24 |
| 2" x 1" | 60.3 | 33.4 | 76 | 0.40 |
| 2" x 1-1/2" | 60.3 | 48.3 | 76 | 0.45 |
| 3" x 2" | 88.9 | 60.3 | 89 | 0.85 |
| 4" x 2" | 114.3 | 60.3 | 102 | 1.30 |
| 4" x 3" | 114.3 | 88.9 | 102 | 1.50 |
| 6" x 4" | 168.3 | 114.3 | 140 | 3.20 |
| 8" x 6" | 219.1 | 168.3 | 152 | 5.10 |
| 10" x 8" | 273.0 | 219.1 | 178 | 7.50 |
Schedule 40 Size & Weight Chart
| NPS (Large x Small) | Large End OD (mm) | Small End OD (mm) | Length (L) (mm) | Approx Weight (kg) |
|---|---|---|---|---|
| 1" x 1/2" | 33.4 | 21.3 | 51 | 0.18 |
| 1-1/2" x 1" | 48.3 | 33.4 | 64 | 0.35 |
| 2" x 1" | 60.3 | 33.4 | 76 | 0.55 |
| 2" x 1-1/2" | 60.3 | 48.3 | 76 | 0.65 |
| 3" x 2" | 88.9 | 60.3 | 89 | 1.25 |
| 4" x 2" | 114.3 | 60.3 | 102 | 1.95 |
| 4" x 3" | 114.3 | 88.9 | 102 | 2.25 |
| 6" x 4" | 168.3 | 114.3 | 140 | 4.75 |
| 8" x 6" | 219.1 | 168.3 | 152 | 7.80 |
| 10" x 8" | 273.0 | 219.1 | 178 | 12.5 |
| 12" x 10" | 323.8 | 273.0 | 203 | 18.0 |
| 16" x 12" | 406.4 | 323.8 | 356 | 35.5 |
Schedule 80 Size & Weight Chart
| NPS (Large x Small) | Large End OD (mm) | Small End OD (mm) | Length (L) (mm) | Approx Weight (kg) |
|---|---|---|---|---|
| 1" x 1/2" | 33.4 | 21.3 | 51 | 0.25 |
| 1-1/2" x 1" | 48.3 | 33.4 | 64 | 0.50 |
| 2" x 1" | 60.3 | 33.4 | 76 | 0.80 |
| 2" x 1-1/2" | 60.3 | 48.3 | 76 | 0.90 |
| 3" x 2" | 88.9 | 60.3 | 89 | 1.75 |
| 4" x 2" | 114.3 | 60.3 | 102 | 2.85 |
| 4" x 3" | 114.3 | 88.9 | 102 | 3.20 |
| 6" x 4" | 168.3 | 114.3 | 140 | 7.15 |
| 8" x 6" | 219.1 | 168.3 | 152 | 12.2 |
| 10" x 8" | 273.0 | 219.1 | 178 | 18.5 |
| 12" x 10" | 323.8 | 273.0 | 203 | 26.5 |
| 16" x 12" | 406.4 | 323.8 | 356 | 52.0 |
Schedule 160 Size & Weight Chart
| NPS (Large x Small) | Large End OD (mm) | Small End OD (mm) | Length (L) (mm) | Approx Weight (kg) |
|---|---|---|---|---|
| 1" x 1/2" | 33.4 | 21.3 | 51 | 0.35 |
| 1-1/2" x 1" | 48.3 | 33.4 | 64 | 0.75 |
| 2" x 1" | 60.3 | 33.4 | 76 | 1.25 |
| 2" x 1-1/2" | 60.3 | 48.3 | 76 | 1.40 |
| 3" x 2" | 88.9 | 60.3 | 89 | 2.60 |
| 4" x 2" | 114.3 | 60.3 | 102 | 4.50 |
| 4" x 3" | 114.3 | 88.9 | 102 | 5.10 |
| 6" x 4" | 168.3 | 114.3 | 140 | 11.5 |
| 8" x 6" | 219.1 | 168.3 | 152 | 20.5 |
| 10" x 8" | 273.0 | 219.1 | 178 | 31.0 |
Schedule XXC Size & Weight Chart
| NPS (Large x Small) | Large End OD (mm) | Small End OD (mm) | Length (L) (mm) | Approx Weight (kg) |
|---|---|---|---|---|
| 1" x 1/2" | 33.4 | 21.3 | 51 | 0.45 |
| 1-1/2" x 1" | 48.3 | 33.4 | 64 | 0.95 |
| 2" x 1" | 60.3 | 33.4 | 76 | 1.60 |
| 2" x 1-1/2" | 60.3 | 48.3 | 76 | 1.85 |
| 3" x 2" | 88.9 | 60.3 | 89 | 3.50 |
| 4" x 2" | 114.3 | 60.3 | 102 | 5.80 |
| 4" x 3" | 114.3 | 88.9 | 102 | 6.50 |
| 6" x 4" | 168.3 | 114.3 | 140 | 14.8 |
| 8" x 6" | 219.1 | 168.3 | 152 | 26.5 |
Available Grades & Materials
Eccentric Reducers are offered in a wide range of materials and grades:
| Material | Grades |
|---|---|
| Stainless Steel | ASTM A403 WP304, WP304L, WP316, WP316L, WP321, WP347 |
| Duplex & Super Duplex: | ASTM A815 UNS S31803, UNS S32750 for extreme corrosion resistance. |
| Nickel Alloys | Inconel 600, 625, Monel 400, Hastelloy C276 for severe environments. |
| Alloy Steel | ASTM A234 WP1, WP5, WP9, WP11, WP22, WP91 for high-temp service. |
| Carbon Steel | ASTM A234 WPB, WPC; ASTM A420 WPL6 for low temperatures. |
| Titanium | Grades 1, 2 for desalination and chemical industries. |
NICKEL ALLOYS
STAINLESS STEEL
DUPLEX & SUPER
TITANIUM ALLOYS
Haynes Superalloys
Inconel
Applications of Eccentric Reducers
Eccentric Reducers are crucial for industries where horizontal pipelines require diameter reduction without trapping air or fluids:
Pump Suction Lines
- Prevents cavitation and air pockets
Oil & Gas Processing
- Horizontal pipe racks and manifolds
Chemical & Petrochemical
- Complete drainage systems for safety
Water Treatment Plants
- Slurry and fluid transport lines
Food & Beverage
- Sanitary processing pipelines
Power Generation
- Cooling water circulation lines
Features & Advantages
Prevents Cavitation
Eliminates trapped gases in pump lines.
Complete System Drainage
Ensures fluid completely exits the piping system.
Optimized Flow
Reduces turbulence compared to abrupt pipe transitions.
Structural Alignment
Simplifies pipe support structures by keeping the pipe bottom flat.
Global Standards Compliance
Manufactured to stringent ASME B16.9 and MSS-SP-43 requirements.
Mechanical Properties – Eccentric Reducers
(Typical values for common grades)
| Grade (ASTM) | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) |
|---|---|---|---|
| A234 WPB (Carbon Steel) | 415 - 585 | 240 | 22 |
| A403 WP316 (Stainless) | 515 | 205 | 28 |
| A815 S31803 (Duplex) | 620 | 450 | 25 |
Why Choose Moksh Tubes?
Frequently Asked Questions (FAQ)
What is the difference between an eccentric and a concentric reducer?
An eccentric reducer reduces the pipe size while keeping one edge of the pipe straight (offset), preventing liquid pooling or gas trapping in horizontal pipelines. A concentric reducer reduces the pipe size symmetrically, keeping the centerline the same, and is primarily used in vertical pipelines.
Why use an eccentric reducer at a pump suction?
At pump suctions, eccentric reducers are installed Top Flat (FOT). This prevents air or gas pockets from accumulating at the top of the pipe, which could enter the pump and cause cavitation damage.
When should the reducer be installed Bottom Flat (FOB)?
Eccentric reducers are installed Bottom Flat on horizontal piperacks. This maintains a consistent bottom-of-pipe (BOP) elevation across pipe supports and ensures complete drainage of the pipeline during shutdowns.
What materials do you offer for eccentric reducers?
We offer them in Stainless Steel (304, 316), Carbon Steel (WPB), Alloy Steel, Duplex/Super Duplex, and Nickel Alloys, depending on the pressure, temperature, and corrosive nature of the fluid.
Contact Us
For further information, quotes, or customized eccentric reducers, Moksh Tubes & Fittings LLP is your dependable partner for industrial piping solutions.
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