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Concentric Reducers
Concentric Reducers feature a symmetrical, cone-like shape where the center lines of both the larger (run) and smaller (branch) pipes perfectly align. This geometry ensures an even distribution of fluid pressure and is typically installed in vertical piping systems to prevent cavitation.
Moksh Tubes & Fittings LLP is a leading manufacturer, supplier, and exporter of Concentric Reducers in India. We cater to high-pressure pipeline requirements across Indian refineries and major Gulf / GCC nations including UAE, Saudi Arabia, Qatar, Oman, and Kuwait.
Manufactured through advanced pressing and machining techniques, our reducers provide a seamless transition between varying pipe schedules and diameters, featuring precision-beveled ends for flawless butt-welding.
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SPECIFICATIONS
| Category | Details |
|---|---|
| Material | Carbon Steel, Stainless Steel, Alloy Steel, Duplex / Super Duplex Steel, Nickel Alloys, Titanium |
| Size Range (Seamless) | 1/2" NB to 24" NB |
| Size Range (Welded) | 24" NB to 48" NB (and above) |
| Wall Thickness (Schedule) | Sch 10, Sch 40, Sch 80, Sch 160, XXS (Custom up to 100mm thick) |
| Type | Concentric (CONC) |
| Dimensional Standards | ASME B16.9, MSS-SP-43, EN 10253, DIN 2616 |
| End Connection | Beveled Ends for Butt-Welding (ASME B16.25) |
Concentric Reducers Weight Chart
| Nominal Pipe Size (Large x Small) | Large End OD (mm) | Small End OD (mm) | End-to-End Length (H) (mm) | Approx. Weight (Sch 40) (kg) |
|---|---|---|---|---|
| 3/4" × 1/2" | 26.7 | 21.3 | 38 | 0.12 |
| 1" × 3/4" | 33.4 | 26.7 | 51 | 0.20 |
| 1-1/2" × 1" | 48.3 | 33.4 | 64 | 0.35 |
| 2" × 1-1/2" | 60.3 | 48.3 | 76 | 0.50 |
| 3" × 2" | 88.9 | 60.3 | 89 | 1.20 |
| 4" × 3" | 114.3 | 88.9 | 102 | 1.85 |
| 6" × 4" | 168.3 | 114.3 | 140 | 4.20 |
| 8" × 6" | 219.1 | 168.3 | 152 | 6.80 |
| 10" × 8" | 273.0 | 219.1 | 178 | 11.30 |
| 12" × 10" | 323.8 | 273.0 | 203 | 16.50 |
*Dimensions conform to ASME B16.9. The End-to-End length (H) determines the slope angle of the reducer.
Available Grades & Materials
| Material Type | ASTM Specification & Grades |
|---|---|
| Carbon Steel | ASTM A234 WPB, WPC, MSS-SP-75 WPHY 42, 46, 52, 60, 65, 70 |
| Low Temp Carbon Steel (LTCS) | ASTM A420 WPL6, WPL3 |
| Alloy Steel | ASTM A234 WP1, WP5, WP9, WP11, WP22, WP91 |
| Stainless Steel | ASTM A403 WP304/304L, WP316/316L, WP321, WP347 |
| Duplex & Super Duplex | ASTM A815 UNS S31803, S32205, S32750, S32760 |
| Nickel Alloys | Inconel 600/625, Hastelloy C276, Monel 400, Alloy 20 |
NICKEL ALLOYS
STAINLESS STEEL
DUPLEX & SUPER
TITANIUM ALLOYS
Haynes Superalloys
Inconel
Applications of Concentric Reducers
Concentric Reducers are universally employed to transition between pipe sizes:
Pump Discharge Lines
- Placed at the discharge side of a centrifugal pump to smoothly transition to a larger pipe diameter.
Vertical Pipelines
- Ideal for vertical pipe runs in chemical plants where gas pocket accumulation is not an issue.
Control Valves
- Used upstream and downstream of control valves to adjust pipe sizing to the valve bore.
Power Generation
- Alloy steel reducers in high-pressure steam distribution headers in thermal plants.
Oil & Gas Refineries
- Transporting crude oil and refined products through varying pipeline capacities.
Water Treatment
- Municipal water supply mains, transitioning from large header pipes to smaller distribution lines.
Features & Advantages
Smooth Transition
Provides a smooth transition between different pipe sizes.
Reduced Turbulence
Reduces pressure loss and turbulence within the pipeline.
Corrosion Resistance
Offers excellent corrosion and oxidation resistance.
High Durability
Built with high mechanical strength and long-lasting durability.
Leak-Proof Connection
Ensures a secure, leak-proof butt weld connection.
Extreme Conditions
Suitable for high-pressure and high-temperature services.
Low Maintenance
Designed for easy installation and minimal maintenance.
Long Service Life
Guarantees extended operational service life.
Global Standards
Manufactured strictly to international quality standards.
Mechanical Properties (Carbon Steel A234 WPB)
| Grade | Tensile Strength (MPa) | Yield Strength (MPa min) | Elongation (%) | Hardness (HB max) |
|---|---|---|---|---|
| ASTM A234 WPB | 415 - 585 | 240 | 22 (longitudinal) | 197 |
| ASTM A234 WPC | 485 - 655 | 275 | 20 (longitudinal) | 223 |
*Properties must match the corresponding seamless pipe specification (e.g., A106 Gr. B for A234 WPB).
Why Choose Moksh Tubes?
Frequently Asked Questions (FAQ)
Why use a Concentric Reducer instead of an Eccentric Reducer?
Concentric reducers are generally used in vertical piping systems or at pump discharges. They provide a smooth, symmetrical transition that minimizes pressure loss. However, if installed horizontally on a pump suction line, they can trap air pockets; in that specific case, an eccentric reducer with the flat side up is required.
Are reducers seamless or welded?
Both. Reducers up to 24" are typically seamless, pressed from seamless pipe. For sizes larger than 24", they are commonly manufactured from welded pipe or rolled and welded steel plates (often referred to as fabricated reducers).
Can I order a reducer with different schedules on each end?
Typically, a reducer maintains the same wall thickness (e.g., Sch 40) across both ends. However, custom reducers with varying wall thicknesses can be manufactured or specially bored to match the inner diameter of specific pipes.
What standards govern concentric reducers?
The most widely accepted dimensional standard is ASME B16.9 (Factory-Made Wrought Buttwelding Fittings). Material standards include ASTM A234 for carbon/alloy steel and ASTM A403 for stainless steel.
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For further information, CAD models, quotes, or custom thickness requirements for Concentric Reducers, Moksh Tubes & Fittings LLP is your trusted partner for premium buttweld fittings.
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