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Hebei haihao high pressure flange & pipe fitting group was established in 1982, located in Mengcun County the hometown of pipe fittings in China.

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Differences between swage nipple and steel reducer

The swage nipple and steel reducer are the two important parts of pipe fittings.They are used in pipe fittings to modify the direction of the flow like elbows,tees etc.These tools can change the volume of the pipe and also connect with various components like couplings.

Concentric swage nipples and eccentric swage nipples

What is a swage nipple?

A swage nipple is something similar to that of a reducer but it is used to join the butt welded pipe with a socket welded or screwed pipe.Like the reducer,swage nipple is also available with two variations:concentric swage nipple and eccentric swage nipple.The swage nipple generally adopts the MSS SP-95 or the BS3799 Standard.

ASME B16.9 A403 WP316L concentric reducers

What is a steel reducer?

A reducer is a tool that is used for reducing the main pipe size.It helps the main pipe run to a smaller one easily.There are two types of reducers in the market:concentric reducer and eccentric reducer.

Since,a reducer and a swage is different. So, you should about the difference these things that are crucial for pipe fittings.

ASTM A234 WPB concentric reducers and eccentric reducers

Some of the differences between reducer and swage nipple are provided below.

1.Difference in size ranges of a swage nipple and steel reducer:

The size range of the reducer is wide.The current size standard of the reducer is from DN15 to DN3400 (from 1/2″ to 136″),while the specification of the swage nipple is from DN6 to DN300 (from 1/4″ to 12″).

2.The swage nipple and reducer raw materials are different:

The raw materials of reducers is seamless steel pipes or steel plates,and the raw materials of swage nipple is round bar steel or billet steel.

ASTM A234 WPB concentric reducers

3.Difference in manufacturing processes of swage nipple and reducer:

The manufacturing process of the reducer is that we adopt the heat pressing process or the cold pressing process for the seamless reducer(the heat treatment is required for the cold pressing process) and we adopt the hot rolling process for the other reducer. The manufacturing process of the swage nipple is the forging process.

4.The connection ends of a swage nipple and a reducer are different:

Beveled ends are basically adopted for reducers, and plain ends are hardly adopted for reducers.Although the plain end are allowed to be used for the stainless steel or the carbon steel reducer product whose wall thickness is lower than a certain amount.Swage nipples have more connection ends,and two ends of swage nipples can be the same or different based on the requirements of sites or designs;connection ends of swage nipples can be divided into beveled ends,plain ends and threaded ends three kinds.The following table is a good introduction to the connection end of the swage nipple.

Different connection ends of swage nipples

1. When we select the swage nipple,we should mark the end.We should also mark NPT or R for taper pipe threads.
2. Big ends and small ends of swage nipples can be divided into plain ends,beveled ends and taper pipe threaded ends three kinds;the following is a table for nine combinations of big and small ends.
Type Big End Small End Code
A plain ends plain ends BEP
B plain ends beveled ends LEP/SEB
C threaded ends LEP/SET
D beveled ends plain ends LEB/SEP
E beveled ends beveled ends BEB
F threaded ends LEB/SET
G threaded ends plain ends LET/SEP
H Thread beveled ends LET/SEB
I threaded ends BET
3. Wall thicknesses of swage nipples are generally Sch80 (3000LB) or Sch160 (6000LB).

Haihao Group supply high quality concentric reducer,eccentric reducer,concentric swage nipple,eccentric swage nipple with carbon steel/stainless steel/alloy steel.We also can supply other pipe fittings(like elbows,tees,bends etc),steel pipes(like seamless steel pipes,API 5L pipes,casing pipes etc) and flanges(like weld neck flange,slip on flange,blind flange,threaded flange etc).If you want to know more about piping products,please feel free to contact us:sales@haihaogroup.com

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