Hastelloy® C-22® Reducers

CSI stocks concentric and eccentric reducers in Hastelloy C-22 with Tri-Clamp® or butt weld connections.

For applications that require 3-A sanitary standards or ASME-BPE standards, CSI stocks 304 and 316L Stainless Reducers for Food, Dairy, & Beverage and BPE Reducers. We also offer AL-6XN® Reducers as another corrosion resistant option.

Length dimensions are consistent with industry standards.

Surface Finish Options
BPE Surface Finish CodeCSI Surface Finish CodeProduct Contact Surface

(Max Ra)*

Product Contact Surface Finish Treatment (ID)Non-Product Contact Surface

(Max Ra)

Non-Product Contact Surface Finish Treatment (OD)Dimensions & Tolerances (BPE) or (CSI)
SF1PL20 µ-inch (0.51 µm)Mechanical Polish/As Drawn32 µ-inch (0.81 µm)Mechanical PolishBPE
SF5PO20 µ-inch (0.51 µm)Electropolished32 µ-inch (0.81 µm)Mechanical PolishBPE
SF6P2525 µ-inch (0.64 µm)Electropolished32 µ-inch (0.81 µm)Mechanical PolishBPE
N/APUMill FinishUnpolished/MillMill FinishUnpolished/MillCSI

C-22 Surface Finish Designations

Butt Weld Concentric ReducersC31-Size-Material-Finish
C-22 Material Part #

(PL Finish)

C-22 Material Part #

(PO Finish)

Size OD

(in)

A

(in)

C31-0.75X0.5-C22-PLC31-0.75X0.5-C22-PO¾ x ½2.125
C31-1X0.5-C22-PLC31-1X0.5-C22-PO1 x ½2.500
C31-1X0.75-C22-PLC31-1X0.75-C22-PO1 x ¾2.125
C31-1.5X0.75-C22-PLC31-1.5X0.75-C22-PO1½ x ¾3.000
C31-1.5X1-C22-PLC31-1.5X1-C22-PO1½ x 12.500
C31-2X1-C22-PLC31-2X1-C22-PO2 x 13.375
C31-2X1.5-C22-PLC31-2X1.5-C22-PO2 x 1½2.500
C31-3X1.5-C22-PLC31-3X1.5-C22-PO3 x 1½4.250
C31-3X2-C22-PLC31-3X2-C22-PO3 x 23.375
2019 BPE DT-4.1.3-1
Butt Weld Eccentric ReducersC32-Size-Material-Finish
C-22 Material Part #

(PL Finish)

C-22 Material Part #

(PO Finish)

Size OD

(in)

A

(in)

C32-0.75X0.5-C22-PLC32-0.75X0.5-C22-PO¾ x ½2.125
C32-1X0.5-C22-PLC32-1X0.5-C22-PO1 x ½2.500
C32-1X0.75-C22-PLC32-1X0.75-C22-PO1 x ¾2.125
C32-1.5X0.75-C22-PLC32-1.5X0.75-C22-PO1½ x ¾3.000
C32-1.5X1-C22-PLC32-1.5X1-C22-PO1½ x 12.500
C32-2X1-C22-PLC32-2X1-C22-PO2 x 13.375
C32-2X1.5-C22-PLC32-2X1.5-C22-PO2 x 1½2.500
C32-3X1.5-C22-PLC32-3X1.5-C22-PO3 x 1½4.250
C32-3X2-C22-PLC32-3X2-C22-PO3 x 23.375
2019 BPE DT-4.1.3-1
Tri-Clamp x Butt Weld Concentric ReducersC31M-Size-Material-Finish
C-22 Material Part #

(PL Finish)

C-22 Material Part #

(PO Finish)

Size OD

(in)

A

(in)

C31M-0.75X0.5-C22-PLC31M-0.75X0.5-C22-PO¾ x ½2.625
C31M-1X0.5-C22-PLC31M-1X0.5-C22-PO1 x ½3.000
C31M-1X0.75-C22-PLC31M-1X0.75-C22-PO1 x ¾2.625
C31M-1.5X0.75-C22-PLC31M-1.5X0.75-C22-PO1½ x ¾3.500
C31M-1.5X1-C22-PLC31M-1.5X1-C22-PO1½ x 13.000
C31M-2X1-C22-PLC31M-2X1-C22-PO2 x 13.875
C31M-2X1.5-C22-PLC31M-2X1.5-C22-PO2 x 1½3.000
C31M-3X1.5-C22-PLC31M-3X1.5-C22-PO3 x 1½4.750
C31M-3X2-C22-PLC31M-3X2-C22-PO3 x 23.875
2019 BPE DT-4.1.3-2
Tri-Clamp x Butt Weld Eccentric ReducersC32M-Size-Material-Finish
C-22 Material Part #
(PL Finish)
C-22 Material Part #
(PO Finish)
Size OD(in)A(in)
C32M-0.75X0.5-C22-PLC32M-0.75X0.5-C22-PO¾ x ½2.625
C32M-1X0.5-C22-PLC32M-1X0.5-C22-PO1 x ½3.000
C32M-1X0.75-C22-PLC32M-1X0.75-C22-PO1 x ¾2.625
C32M-1.5X0.75-C22-PLC32M-1.5X0.75-C22-PO1½ x ¾3.500
C32M-1.5X1-C22-PLC32M-1.5X1-C22-PO1½ x 13.000
C32M-2X1-C22-PLC32M-2X1-C22-PO2 x 13.875
C32M-2X1.5-C22-PLC32M-2X1.5-C22-PO2 x 1½3.000
C32M-3X1.5-C22-PLC32M-3X1.5-C22-PO3 x 1½4.750
C32M-3X2-C22-PLC32M-3X2-C22-PO3 x 23.875
2019 BPE DT-4.1.3-2
Tri-Clamp Concentric ReducersC31-14MP-Size-Material-Finish
C-22 Material Part #

(PL Finish)

C-22 Material Part #

(PO Finish)

Size OD

(in)

A

(in)

C31-14MP-0.75X0.5-C22-PLC31-14MP-0.75X0.5-C22-PO¾ x ½3.125
C31-14MP-1X0.5-C22-PLC31-14MP-1X0.5-C22-PO1 x ½3.500
C31-14MP-1X0.75-C22-PLC31-14MP-1X0.75-C22-PO1 x ¾3.125
C31-14MP-1.5X0.5-C22-PLC31-14MP-1.5X0.5-C22-PO1½ x ½3.500
C31-14MP-1.5X0.75-C22-PLC31-14MP-1.5X0.75-C22-PO1 ½ x ¾4.000
C31-14MP-1.5X1-C22-PLC31-14MP-1.5X1-C22-PO1½ x 13.500
C31-14MP-2X1-C22-PLC31-14MP-2X1-C22-PO2 x 14.375
C31-14MP-2X1.5-C22-PLC31-14MP-2X1.5-C22-PO2 x 1½3.500
C31-14MP-3X1.5-C22-PLC31-14MP-3X1.5-C22-PO3 x 1½5.250
C31-14MP-3X2-C22-PLC31-14MP-3X2-C22-PO3 x 24.375
2019 BPE DT-4.1.3-3
Tri-Clamp Eccentric ReducersC32-14MP-Size-Material-Finish
C-22 Material Part #
(PL Finish)
C-22 Material Part #
(PO Finish)
Size OD(in)A(in)
C32-14MP-0.75X0.5-C22-PLC32-14MP-0.75X0.5-C22-PO¾ x ½3.125
C32-14MP-1X0.5-C22-PLC32-14MP-1X0.5-C22-PO1 x ½3.500
C32-14MP-1X0.75-C22-PLC32-14MP-1X0.75-C22-PO1 x ¾3.125
C32-14MP-1.5X0.5-C22-PLC32-14MP-1.5X0.5-C22-PO1½ x ½3.500
C32-14MP-1.5X0.75-C22-PLC32-14MP-1.5X0.75-C22-PO1½ x ¾4.000
C32-14MP-1.5X1-C22-PLC32-14MP-1.5X1-C22-PO1½ x 13.500
C32-14MP-2X1-C22-PLC32-14MP-2X1-C22-PO2 x 14.375
C32-14MP-2X1.5-C22-PLC32-14MP-2X1.5-C22-PO2 x 1½3.500
C32-14MP-3X1.5-C22-PLC32-14MP-3X1.5-C22-PO3 x 1½5.250
C32-14MP-3X2-C22-PLC32-14MP-3X2-C22-PO3 x 24.375
2019 BPE DT-4.1.3-3
More Reducers


Typically, CSI stocks butt-weld fittings. If you're looking for a different connection, we can also provide Tri-Clamp, I-line, SMS, or DIN options. Most of our fittings are offered in standard BPE dimensions. At CSI, we stock polished fittings, and unpolished fittings are available upon request.
For 304 and 316L Stainless reducers that meet 3-A sanitary or BPE standards, visit the Reducers for Food, Dairy, & Beverage and BPE Reducers pages. CSI also offers AL-6XN® Alloy Reducers.


Still don't see what you need? Call CSI for configurations not listed or for custom fabrications.

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