MS Buttweld 'B' Class

Reducer

Mild Steel · ASME B16.9 · 20 sizes

Request a quote for this item

← All B Class (Medium)

MS Buttweld 'B' Class

Buttweld Reducer

7307MSW40B201

Material: Mild Steel (IS 1239 Part 2 / IS 2062 Gr. A)
Type: Welded (ERW)
Shape: Concentric
Schedule: Class B (Medium)
End Connection: Beveled End
Dimension Standard: ASME B16.9
Temperature: -10°C to 300°C
Pressure Rating: ~42 bar (IS 1239 Class B, Medium)
HSN Code: 73079300
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	2.0	2.0	38	Concentric
1" × 3/4" NB	33.4	26.7	2.5	2.0	51	Concentric
1" × 1/2" NB	33.4	21.3	2.5	2.0	51	Concentric
1-1/4" × 1" NB	42.2	33.4	3.0	2.5	51	Concentric
1-1/2" × 1-1/4" NB	48.3	42.2	3.0	3.0	64	Concentric
1-1/2" × 1" NB	48.3	33.4	3.0	2.5	64	Concentric
2" × 1-1/2" NB	60.3	48.3	3.0	3.0	76	Concentric
2" × 1-1/4" NB	60.3	42.2	3.0	3.0	76	Concentric
2" × 1" NB	60.3	33.4	3.0	2.5	76	Concentric
2-1/2" × 2" NB	73.0	60.3	3.5	3.0	89	Concentric
3" × 2-1/2" NB	88.9	73.0	3.5	3.5	89	Concentric
3" × 2" NB	88.9	60.3	3.5	3.0	89	Concentric
4" × 3" NB	114.3	88.9	3.5	3.5	102	Concentric
4" × 2-1/2" NB	114.3	73.0	3.5	3.5	102	Concentric
5" × 4" NB	141.3	114.3	4.0	3.5	127	Concentric
6" × 5" NB	168.3	141.3	4.0	4.0	140	Concentric
6" × 4" NB	168.3	114.3	4.0	3.5	140	Concentric
8" × 6" NB	219.1	168.3	4.5	4.0	152	Concentric
10" × 8" NB	273.0	219.1	4.5	4.5	178	Concentric
12" × 10" NB	323.8	273.0	4.5	4.5	203	Concentric

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

Certification: All relevant test certificates or document will be provided.
Coating: Anticorrosion Paint Charges Included and Hot Dip Galvanizing Coating (GI), Epoxy Coating Charged Extra.
Taxes & Duties: GST and any other statutory levies shall be charged extra at applicable 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

More in B Class (Medium)

MS Buttweld 'B' Class

Need a quotation or technical query?

Ask for Reducer pricing, availability, MTRs and custom sizes.

Request a quote for this item