AS P11 P22 Buttweld

Reducer

Alloy Steel · ASME B16.9 · 12 sizes

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AS P11 P22 Buttweld

Buttweld Reducer

7307AS40P11201

Material: Alloy Steel (ASTM A234 WP11 / WP22)
Type: Seamless
Shape: Concentric
Schedule: SCH 40 / STD (PWHT Required)
End Connection: Beveled End per ASME B16.25
Dimension Standard: ASME B16.9
Temperature: Up to 580 deg C (PWHT Required)
Pressure Rating: Per ASME B31.1 / B31.3 at elevated temperature
HSN Code: 73079990
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
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
2" × 1-1/2" NB	60.3	48.3	3.91	3.68	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
5" × 4" NB	141.3	114.3	6.55	6.02	127.0	Concentric
6" × 4" NB	168.3	114.3	7.11	6.02	139.7	Concentric
8" × 6" NB	219.1	168.3	8.18	7.11	152.4	Concentric
10" × 8" NB	273.0	219.1	9.27	8.18	177.8	Concentric
12" × 10" NB	323.8	273.0	10.31	9.27	203.2	Concentric

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

Certification: MTR, hardness, impact, PMI mandatory.
Coating: Bare / primer painted. PWHT hardness certificate included.
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

More in WP11 / WP22 (Cr-Mo Grade)

AS P11 P22 Buttweld

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