The concentric reducer is cone-shaped fitting which is used to enlarge reduce the diameter about center line. It is easy to transport mud grinding fluid are suitable for corrosive operations, also beneficial to use different ratings to wear protection is required in conveying between flanges pipes. The common used material in industires are carbon steel, alloy steel stainless steel.

Buttwelding Fittings are used in a piping system to change direction function of media, to branch off, reduce pipe size attach auxiliary equipment. They are availbale in multiple types as elbow, tee, cap, concentric reducer, stub end oelt, that produced in cold hot forming based on ASTM A403 ASTM A234 specification.

ASTM A403 WP304 & 316 Stainless Steel Pipe Fittings

The specification of ASTM A403 covers common stainles steel grades WP304 & 316 that used for pressure piping. Customers need to indicate seamless welded type while purchasing kinds grades fittings, such as concentric reducers, buttwelding tee & cross, steel pipe bend elbow.

ASTM A234 Carbon Steel Alloy Steel Pipe Fittings

This specifiation covers ASTM A234 carbon steel alloy steel fittings of semaless welded construction by the standard of ASME B16.9. These fittings are for use in pressure piping in pressure vessel fabrication for service at moderate elevated temperatures.

Material for Concentric Redcuer ASME B16.9 

Stainless Steel Grades

ASTM A403 WP304/304L/304H, 316/316L, 310S, 317,347,904L

Carbon Steel Grades

ASTM A234 WPB/WPC, ASTM A420 WPL6, ASTM A860 WPHY 42 / 46 / 56 / 60 / 65

Alloy Steel Grades

ASTM A234 WP11 / WP12 / WP 5 / WP9 / WP91 / WP92 / WP 22

ASME B16.9 Concentric Reducer Dimensions & Sch 40 Weight  

Notes 

1) Besides the above mentioned standards, the standards of GB/T 10752 SH 3408 SH 3409 HG/T 21635 HG/T 21631 SY/T 0510 DL/T 695 EN 10253 etc.are also applied. 

2) For the concentric eccentric reducers with the sizes larger than that listed in the above table, they will be supplied subject to the sizes agreed by purchaser manufacturer according to manufacturer's size.