Reducers: Materials, Types, Applications and Other Considerations
A reducer, also known as an alloy size header, is a key pipe fitting used to connect pipes of different diameters. Commonly paired with alloy seamless or welded tubes, it offers excellent corrosion and high-temperature resistance.
Reducers come in two types based on shapes: concentric and eccentric.
Common materials of reducers include stainless steels, nickel alloys and super alloys, ensuring compatibility with different applications.
Whatever size at whatever tight tolerance of custom made reducers you demand, SEATHER here is sure to have it!
Reducers Specifications:
- Size Range: 1/2″ – 48″ NPS (Larger sizes available upon drawing request)
- SCH: 5 ~ XXS
- Grades: Stainless Steels, etc.
- Standards: ASTM B462 / ASME B16.9 / MSS SP-25
- Classification: Concentric Reducer, Eccentric Reducer
Connection Methods: Clamped, Welded & Threaded
Your Trusted Reducers Manufacturer In China
Seather provides alloy reducers of various shapes and sizes. According to your needs, we can perform sand blasting, sand rolling or polishing treatment on the finish of alloy reducers.
Seather supplies different nickel alloy grades: 400, K-500, 600, 601, 625, 718, 800, 825, A-286, B-2, C-22, C-276, etc. The outer diameter of our alloy reducer ranges from 21.3mm to 457mm. Customized size is also available.
Our products have higher quality and competitive price. Our sales team are more professional and responsible. Please don’t hesitate to contact us today!
Reducers Materials & Grades
Nickel Alloys
UNS N10276,N06022,N04400,N06600,N06601,N06625, N08800, N08825,N08020 (W2.4819,2.4360,2.4361,2.4602,2.4816,2.4851,2.4856,2.4858,1.4876,1.4958 ) etc.
Stainless Steels
304, 304L,316, 316L, 316Ti, 317L, 321,321H, 310H, 347H, N08904, F51, F53, F55, F59, F60 (W1.4462, 1.4410, 1.4501, 1.4507 etc.)

Types of The Reducers
Reducers come in various types, and selecting the right design for your piping system is crucial for reliable performance, longevity, and cost-efficiency. Here are the most common reducer types available.

Reducers Applications & Usages
1. Seamless water pipes and steam pipes for power plant water supply
2. Sea water exchanger and evaporator
3. Sulfuric acid and hydrochloric acid environment
4. Crude oil distillation
5. Pump shaft and propeller of equipment used in sea water
6. The nuclear industry is used to manufacture equipment for uranium extraction and isotope separation
7. Pumps and valves used in hydrochloric acid production equipment
Manufacturing Process of Reducers
Reducers Standards and Markings
Standards:
We manufacture reducers strictly according to recognised standards:
- ASTM B366,
- ASTM B366M,
- ASTM B462
- ASME B16.9,
- ASME B16.11
- MSS SP-25,
- MSS SP-43
Markings:
When replacing or checking reducers, it’s essential they have markings. These markings follow a specific sequence: manufacturer logo, ASTM material grade and any special designations.
This guide provides a comprehensive overview of reducer design and selecting the right elbow for your piping system. However, due to the vast range of stainless steel and nickel alloy materials available, it’s impossible to cover every detail or configuration here.
If you have any questions, Seather Technology’s Technical Sales Experts are here to assist. With over 16 years of experience serving global industries, we understand the complexities of alloy piping and your industry’s specific needs. Contact us today for more information and to find the perfect flanges, bolts, elbows, pipe fittings and components for your next project.
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