SS316L Eccentric Reducer

SS316L Eccentric Reducer Introduction

Eccentric reducers have different end sizes and are used to connect pipes of different diameters on the same axis. The eccentric type is more commonly used when pipes are laid on pipe racks. Because the sides are flat, it's easier to align and securely mount the pipes to the rack.

Eccentric reducer is mainly used in horizontal pipelines. Concentric reducer is mainly used for vertical pipeline. The joint effect of the two is that the diameter change needs to change from one specification to another.

Eccentric reducers are often used to avoid trapped air within a system, so they are often used when air and liquid are likely to flow simultaneously. It is also used when pipes must maintain the same top or bottom level. It is also often used to avoid trapped air in the system, so it is often used where air and liquid may flow at the same time.

Eccentric Reducer Specification

ASME B16.9 Eccentric Reducer Production Standard

Standard Scope

Eccentric reducer production standard is ASME B16.9. The standard includes specifications of  NPS 1/2 to NPS 48 (DN15-DN1200) factory-made wrought butt welded pipe fittings overall dimensions, tolerances ratings, test methods and markings.

Material Types Referred

Wrought fittings covered by this Standard shall be in accordance with ASTM A234, ASTM A403, ASTM A420, ASTM A815, ASTM B361, ASTM B363, ASTM B366, or the corresponding specification listed in ASME BPVC, Section II.

Supply Range for Butt Weld Pipes Fittings Refer ASME B16.9

Standard: ASTM A234, MSS SP-75, ASTM A403, ASTM A420
Types: Elbow, Tee Equal and Reducing, Cap, Concentric/Eccentric Reducer
Size Range: 1/2" to 48".
Thickness: SCH 10, SCH 40, SCH 80
Surface Coatings: Black Painted, Varnished, Epoxy Coated, Galvanized

Units

Units under ASME B16.9 shall be stated in both SI (Metric) and U.S. Customary units. Designation for size is NPS

How to Installed Eccentric Reducer

How a reducer is installed depends on the material that the reducer and the pipes are made from. If the reducer and pipes are made from metal, they can be butt-welded together. There are reducers that may have push-to-fit or crimp installations as well. It depends on how the reducer was made, the material, and the goals for the reducer.

To install the SS316/L eccentric reducer, it will be fitted on both pipes, and connected in the appropriate way. But care must be taken with eccentric reducers to ensure that the bottom of the eccentric reducer is properly lined up. In piping liquids horizontally, eccentric reducers need the flat side up, because otherwise gasses can collect. But in piping vapors horizontally, eccentric reducers need the flat side down, because they need to avoid collecting liquids.

ASME B16.9 Eccentric Reducer Dimensions

Notes

1) Besides the above mentioned standards, the standards of GB/T 10752 SH 408 SH 3409 HG/T 21635 HG/T 21631 SY/T 0510 DL/T 695 EN 10253 etc.are also applied.

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

Dimensional Inspection

Dimensional inspection ensures that the SS316/L eccentric reducer meet the specified dimensions and tolerances according to the relevant standards, such as ASME B16.9 or MSS SP-75. This process includes measuring the diameter, thickness, and length of the fittings, as well as the radius of elbows and the height of tees. Accurate dimensions are critical to ensure proper alignment, fit, and sealing when connecting pipes and equipment.