SS 316 Buttweld

Reducer

Stainless Steel · ASME B16.9 · 10 sizes

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SS 316 Buttweld

Buttweld Reducer

7307SS31640201

Material: Stainless Steel 316/316L (ASTM A403 WP316)
Type: Seamless
Shape: Concentric
Schedule: SCH 40S
End Connection: Beveled End per ASME B16.25
Dimension Standard: ASME B16.9
Temperature: -196 deg C to 870 deg C
Pressure Rating: Per ASME B31.3 schedule rating
HSN Code: 73072990
GST: 18%

Schematic: letters match the table columns

Illustration

7 columns · scroll sideways

SizeNPS	OD Large (D)mm	OD Small (D1)mm	Wall Large (t)mm	Wall Small (t1)mm	Length (H)mm	Type
3/4" × 1/2" NB	26.7	21.3	2.87	2.77	38.1	Concentric
1" × 3/4" NB	33.4	26.7	3.38	2.87	50.8	Concentric
1-1/4" × 1" NB	42.2	33.4	3.56	3.38	50.8	Concentric
1-1/2" × 1-1/4" NB	48.3	42.2	3.68	3.56	63.5	Concentric
1-1/2" × 1" NB	48.3	33.4	3.68	3.38	63.5	Concentric
2" × 1-1/2" NB	60.3	48.3	3.91	3.68	76.2	Concentric
2" × 1-1/4" NB	60.3	42.2	3.91	3.56	76.2	Concentric
2-1/2" × 2" NB	73.0	60.3	5.16	3.91	88.9	Concentric
3" × 2" NB	88.9	60.3	5.49	3.91	88.9	Concentric
4" × 3" NB	114.3	88.9	6.02	5.49	101.6	Concentric

Pricing: prices for this product are not listed. Request a quotation.

Certification: MTR, PMI, dye penetrant (PT) test certificates available.
Coating: 2B mill finish. Mirror / brushed / electropolished on request.
Taxes & Duties: GST and all applicable levies charged extra at prevailing rates.

All dimensions in millimetres. Subject to change without notice. Spotted a mistake or wrong data? Please contact us.

About the reducer

A concentric reducer transitions between two different pipe sizes while keeping the centreline aligned. Used where the centreline must remain constant: most common in overhead lines and where pipe supports must remain level.

Smooth conical transition between two bore sizes
Centrelines of inlet and outlet are collinear (concentric)
Available in any large-end × small-end combination
Length H per ASME B16.9 based on size combination
Bevel both ends for butt weld connection

Applicable Standards

Standards governing design, dimensions, and testing

ASME B16.9

Factory-Made Wrought Buttwelding Fittings

Covers the full range of industrial butt weld fittings (elbows, tees, reducers, caps, returns) in carbon steel, alloy steel, and stainless steel from ½" to 48" NB.

Applies to NPS ½" through 48" (DN 15 through DN 1200)
Schedule wall: STD / XS / XXS plus full SCH range
Radius: Long Radius (LR) 1.5D and Short Radius (SR) 1.0D elbows
Dimensional tables are the only source of 'legal' wall thickness
No pressure-temperature rating: use ASME B31.3 / B31.1 with pipe schedule
End prep: per ASME B16.25 bevel

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SS 316 Buttweld

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