Weldable 304 316L Stainless Steel Reducer Pipe Reducer Fitting ASME B16.9

Product Specification

Weldable 304 316L Stainless Steel Reducer Pipe Fitting ASME B16.9

1. Product Description

A Stainless Steel Reducer is a pipe fitting used to connect pipe sections of different diameters, commonly referred to as a “reducing coupling” or “size changer.” It is mainly available as a concentric reducer or an eccentric reducer. A concentric reducer has both ends on the same centreline and a symmetrical conical body, making it suitable for vertical lines or where centreline alignment is required. An eccentric reducer has one straight side with offset centrelines and can be supplied as bottom-of-pipe (BOP) or top-of-pipe (TOP) for horizontal liquid lines to prevent air pockets, aid drainage, and reduce solids settling. Common materials include 304, 304L, 316, 316L, 321, 310S, and duplex stainless steels. Reducers can be formed by reducing, expanding, or stamping seamless pipe, or fabricated from rolled and welded plate. Ends can be bevelled, plain, threaded, or press-fit, with surface treatments such as pickling and passivation or mirror polishing.

2. Applications

Stainless steel reducers are widely used for transition connections between pipes of different diameters. Typical applications include oil and gas gathering and refining, chemical process media transport, water treatment and potable water systems, hygienic piping in food, beverage, and pharmaceutical plants, auxiliary systems in power generation and shipbuilding, HVAC water systems, and pump suction and discharge lines. Eccentric reducers are often used in horizontal pump suction lines, where BOP installation helps reduce air-pocket formation; concentric reducers are commonly used in vertical lines, gas or steam piping, pump discharge lines, and applications requiring a symmetrical flow field.

3. Advantages

• Excellent corrosion resistance: stainless steel tolerates water, steam, many chemicals, and cleaning/disinfection conditions, supporting long-term stable operation.

• Good pressure capability: butt-weld and forged reducers can withstand elevated internal pressure, suitable for industrial pressure piping.

• Good hygienic performance: polished interiors are smooth and reduce residue buildup and microbial growth, meeting food and pharmaceutical cleanliness requirements.

• Smooth hydraulic transition: the conical reducing structure promotes gradual velocity change and reduces local turbulence and pressure loss.

• Flexible connection options: butt-weld, threaded, socket-weld, press-fit, and clamp-on connections suit different pipe materials and site conditions.

• Wide size range and customisability: size, wall thickness, material, eccentric orientation, and surface finish can be tailored to project requirements.

4. Functions

The core function of a stainless steel reducer is to provide a smooth, reliable transition and connection between different pipe diameters. Concentric reducers maintain centreline alignment and are suitable for vertical installation, gas/steam lines, and applications requiring a symmetrical flow field. Eccentric reducers, with one straight side, prevent gas accumulation, promote drainage, and reduce solids settling in horizontal liquid lines, and are commonly used in pump suction piping and slurry systems. Reducers also help control flow distribution, reduce flow disturbance, and protect downstream pumps, valves, and instruments.

5. Key Specifications

FAQ

1. Are you trading company or manufacturer ? We are manufacturer ,You can see the certification.

2.How long is your delivery time? Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to quantity.

3. Do you provide samples ? is it free or extra ? Yes, we could offer the sample for free charge but need pay the cost of freight.

4. What is your terms of payment ? Payment<=1000USD, 100% in advance. Payment>=1000USD, 50% T/T in advance ,balance before shippment.