BW PIPE REDUCER AND CAP

A butt weld pipe reducer is used to increase or decrease the bore size of a pipeline or of a piping system. There are two shapes of butt weld reducers, concentric and eccentric, manufactured according to the ASME B16.9 (carbon and alloy) and MSS SP 43 specifications (stainless steel and nickel alloys). Pipe reducers are available in sizes from 1/2 inch to 48 inches and in multiple material grades, as carbon steel (ASTM A234 WPA, WPB, WPC), alloy steel (ASTM A234 WPxx) and stainless steel (ASTM A403 and ASTM A815 for duplex and super duplex materials). 

Pipe Reducer

Pipe reducers are manufactured in multiple dimensions to fit ASME B36.10 carbon/alloy steel pipes and ASME B36.19 stainless steel and nickel alloy pipes. The most common material grades for concentric and eccentric reducers are the ASTM A234 WPB and WPC (carbon and alloy steel reducers), and the ASTM A403 (stainless steel reducers).

 

PIPE REDUCERS TYPES

Pipe reducers can be either concentric or eccentric:

CONCENTRIC REDUCER

The open ends of a concentric reducer are aligned and centered one to the other. Generally, this type of pipe reducer is used to modify the bore size of the pipeline by two (maximum three) measures, to avoid an excessive pressure drop in the pipeline.

If the required size reduction is larger, a cascade of butt weld fittings (multiple pipe reducers in sequence) has to be used to have a smooth and gradual adjustment of the flow capacity of the pipeline.

 

Pipe reducer: Concentric Reducer

 

ECCENTRIC REDUCER

The open ends of an eccentric reducer are in an “offset” position one to the other. Eccentric reducers are used, generally, for pipelines installed in a horizontal position (whereas concentric reducers are used for pipelines installed vertically or for the inlets of suction pumps, as top flat eccentric reducers).

 

Pipe Reducer: Eccentric Reducer

 

TOP AND BOTTOM FLAT ECCENTRIC REDUCER

Eccentric reducers can be top flat (“TF”) or bottom flat (“BF”). The bottom flat eccentric reducer type is used for pipe-racks (the bottom of the reducer is flat and at the same level of the bigger sized run pipe), while the top flat pipe reducer type is used at the inlet of piping suction pumps as shown in the image below (this setup prevents the formation of vapor traps in the pipeline):

Top flat and bottom flat eccentric reducer for suction pump

 

CONCENTRIC VS ECCENTRIC REDUCER

The key difference between concentric vs eccentric reducer is the centricity of the inlet vs. the outlet of the fitting, which is perfect for a concentric reducer and offset of an eccentric reducer.

 

PIPE REDUCER MANUFACTURING PROCESS

The manufacturing process of pipe reducers is shown in the image below.

manufacturing process of concentric reducers

PIPE CAP

A butt weld pipe cap is used to blind or isolate the pipeline, permanently or temporarily (for example during the execution of maintenance and reparation works). A pipe cap can be manufactured using steel plates for most sizes and materials (ASTM A234 and ASTM A420 for applications requiring carbon steel materials, ASTM A403 for services requiring stainless steel materials).

The pipe cap dimensions and tolerances are set by the ASME B16.9 (carbon and alloy steel caps) and MSS SP43 (stainless and nickel-alloys caps). The shape of a pipe cap is ellipsoidal and conforms to the requirements set by the «ASME Boiler and Pressure Vessel» code.

 

Butt Weld Pipe Cap

 

PIPE CAP MANUFACTURING PROCESS

manufacturing process of butt weld caps

 

Read this article to learn more about the materials grades for pipe caps. Dimensions and weights charts for pipe caps are shown in this other article.

 

PIPE REDUCERS AND CAPS PRICES

Looking for the price of pipe reducers? Click on the image and check our online steel reducer price estimation tool!

Pipe Reducer Price

The tool estimates the price for pipe reducers manufactured in Europe and Asia.

Even if our price estimates are reliable, prices shall always be double checked with butt weld fittings manufacturers and distributors.

 

BUY AND SELL PIPE REDUCERS ONLINE!


PIpe Price

Do you BUY pipe reducers? 
Take a look at the steel reducers for sale of our suppliers (manufacturers, stockists, and distributors), find the reducer you need and close the order online in few easy steps. Don’t find what you need? Post a request for quote (RFQ) for pipe reducers and get offers from trustable vendors!

Do you SELL pipe reducers?
If you are a manufacturer, a stockist or a distributor of pipe reducers, list your fittings and start getting orders from international buyers directly. Over 50.000 people are on Projectmaterials.com every day: what are you waiting for?

REGISTER FREE! Start buying and selling pipe reducers online with one single free account today!


About Projectmaterials.com

Projectmaterials.com logo

Projectmaterials.com is an innovative vertical B2B marketplace to facilitate business among buyers and sellers of materials for oil & gas, construction, power generation, shipbuilding, and renewable energies projects. Sellers can showcase their company profile and abilities on our portal, publish and sell products online, and build relationships with international buyers, as EPC Contractors, End-Users and traders. Buyers can order products online, float requests for quote (RFQ), and communicate with suppliers from all over the world. To help remote or unknown Partners transact safely, Projectmaterials.com offers also an Escrow payment service (powered by Payoneer, a leading provider of B2B payments). Further, we have partnered with SGS (global leader in company inspection services) to verify the profiles of the registering companies and guarantee quality.

Swiss FlagProjectmaterials.com, Lugano Switzerland
Get in Touch!