Product Catalogue

Butt-Weld Fittings & Flanges to ASME B16.9, B16.28, B16.5 & B16.47

Carbon Steel, Alloy Steel and Stainless Steel fittings — seamless to 24" NB and welded (WX) from 48" NB and above, Schedules 20 through XXS, all IBR Approved and EN 10204 3.1 / 3.2 traceable.

Elbows Tees Reducers Caps & Stub Ends Laterals & Crosses Flanges Material Grades

Material Grade Matrix

Every fitting and flange is manufactured to the chemical composition, mechanical property and heat-treatment requirements of the governing ASTM / ASME specification. Material grade availability below applies across Elbows, Tees, Reducers, Caps, Stub Ends, Laterals, Crosses and Flanges.

Material Family	Grade / Designation	Governing Specification	Typical Service	Service Temp. Range
Carbon Steel	WPB / WPB-W →	ASTM / ASME A234	General process & utility piping, refinery units	-29°C to 425°C
Carbon Steel (Low Temp.)	WPL6 →	ASTM / ASME A420	Cryogenic & sub-zero pipelines, LPG / LNG systems	-46°C to 345°C
Alloy Steel	WP11 (1.25Cr-0.5Mo) →	ASTM / ASME A234	Boiler headers, superheater & reheater piping	Up to 580°C
Alloy Steel	WP22 (2.25Cr-1Mo) →	ASTM / ASME A234	High-temperature steam & hydroprocessing piping	Up to 580°C
Alloy Steel	WP91 (9Cr-1Mo-V) →	ASTM / ASME A234	Ultra-supercritical power plant main steam lines	Up to 600°C
Alloy Steel	WP92 →	ASTM / ASME A234	Next-generation USC boiler & turbine piping	Up to 650°C
Alloy Steel	WP5 (5Cr-0.5Mo) →	ASTM / ASME A234	Fired heater & hydroprocessing piping	Up to 600°C
Alloy Steel	WP9 (9Cr-1Mo) →	ASTM / ASME A234	Hydrogen reformer & high-temperature process lines	Up to 600°C
Stainless Steel	WP304 / 304L / 304H →	ASTM / ASME A403	General corrosion service, food & pharma piping	Cryogenic to 427°C
Stainless Steel	WP316 / 316L / 316H →	ASTM / ASME A403	Chloride-rich & marine environments, chemical processing	Cryogenic to 427°C
Stainless Steel	WP321 →	ASTM / ASME A403	High-temperature exhaust & ducting systems	Up to 900°C (intermittent)
Duplex	Duplex 2205 (S32205) →	ASTM / ASME A815	Chloride SCC service, oil & gas, desalination, FGD	PREN ≈ 35
Super Duplex	Super Duplex 2507 (S32750) →	ASTM / ASME A815	Seawater, subsea & offshore, aggressive chlorides	PREN ≈ 42

All grades available with full chemical composition and mechanical property reports per EN 10204 3.1 / 3.2. PMI (Positive Material Identification) testing available on every consignment.

Buttweld Elbows

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Buttweld 90 degree and 45 degree elbows manufactured by IBR Fittings

Manufactured to ASME B16.9 (Long Radius) and ASME B16.28 (Short Radius), our elbows are available in 45°, 90° and 180° configurations across Long Radius (LR, centre-to-end = 1.5 × NPS) and Short Radius (SR, centre-to-end = 1.0 × NPS) types. Manufactured by hot induction bending and forming from seamless and welded pipe, with full wall-thickness verification.

Configurations: 45°, 90°, 180° (return bends)
Types: Long Radius (LR) & Short Radius (SR)
Size Range: 1/2" to 48" NB and above
Schedules: SCH 20 to SCH 160 / XXS
Construction: Seamless (≤24") / Welded WX (≥48")
Standard: ASME B16.9 / ASME B16.28

Centre-to-End Dimension "A" for 90° Elbows per ASME B16.9 / B16.28 (mm) — illustrative reference
NPS (in)	Outside Diameter (mm)	90° LR “A” (1.5×NPS) mm	90° SR “A” (1.0×NPS) mm	45° LR “A” (0.625×NPS) mm
2	60.3	76	51	32
4	114.3	152	102	64
6	168.3	229	152	95
8	219.1	305	203	127
12	323.9	457	305	191
16	406.4	610	406	254
20	508.0	762	508	318
24	610.0	914	610	381

Equal & Reducing Tees

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Equal buttweld tee fittings manufactured by IBR Fittings

Our buttweld tees provide branch connections for process, utility and boiler-grade piping systems, manufactured to ASME B16.9 with run and branch dimensions matched to header and branch pipe schedules. Available as Equal Tees (branch NB = run NB) and Reducing Tees (branch NB < run NB).

✓ Size range: 1/2" to 48" NB and above (run); reducing outlets to 1/4"
✓ Schedules: SCH 20 to SCH 160 / XXS, matched run & branch
✓ Construction: Forged/seamless (≤24"), fabricated welded (≥48")
✓ Standard: ASME B16.9, run-to-branch centreline per "C" and "M" dimensions
✓ Materials: Carbon, Alloy & Stainless Steel per material grade matrix

Typical Applications

Branch take-offs on boiler feedwater & steam headers
Instrumentation & drain connections on process piping
Header distribution in utility & cooling water systems
Tie-ins for tank farm and pipeline manifold systems

Concentric vs. Eccentric

Concentric Reducers maintain a common centreline between the larger and smaller ends — ideal for vertical lines and general diameter transitions.

Eccentric Reducers offset the centreline, creating a flat top or bottom profile — used in horizontal lines to maintain a level pipe crown (top-flat) for gas/vapour service or level invert (bottom-flat) for gravity drainage and to prevent liquid pocketing.

Concentric & Eccentric Reducers

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Concentric and eccentric reducer fittings manufactured by IBR Fittings

Manufactured to ASME B16.9 dimensional standards, our reducers provide smooth, low-turbulence transitions between two different pipe sizes, minimising pressure drop and erosion at the transition zone.

✓ Size range: 1/2" to 48" NB and above
✓ Schedules: SCH 20 to SCH 160 / XXS, large & small end independently specified
✓ Standard: ASME B16.9, taper length "H" per nominal size combination
✓ Materials: Carbon, Alloy & Stainless Steel per material grade matrix

Pipe Caps

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Buttweld end caps manufactured to ASME B16.9, used to close the end of a pipe run, fitting or header. Hemispherical/ellipsoidal forming with controlled wall thinning to meet minimum thickness requirements at the crown.

✓ Size range: 1/2" to 48" NB and above
✓ Schedules: SCH 20 to SCH 160 / XXS
✓ Standard: ASME B16.9

Lap Joint Stub Ends

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Stub ends are used in conjunction with a Lap Joint Flange to create a rotatable flange connection, simplifying bolt-hole alignment and enabling the use of stainless/alloy stub ends with carbon steel backing flanges to reduce material costs.

✓ Types: Type A (machined) and Type B (as manufactured)
✓ Dimensions matched to ASME B16.5 lap joint flange seating
✓ Materials: Carbon, Alloy & Stainless Steel per material grade matrix

Laterals

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Laterals provide an angled branch connection (typically 45°) for piping systems where flow direction or gravity drainage requirements make a standard tee impractical — common in pipeline manifolds and tank farm systems.

✓ Equal & reducing configurations available
✓ Custom fabricated to project-specific layouts on request

Crosses

Four-way fittings providing two opposing branch connections from a single run, used in symmetric distribution headers and fire protection ring mains where multiple take-offs are required from a single point.

✓ Equal & reducing configurations available
✓ Manufactured to ASME B16.9 run/branch dimensions

IBR Approved Flanges

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Manufactured to ASME B16.5 (NPS ½" to 24") and ASME B16.47 Series A & B (NPS 26" to 60"), our flanges are available across all standard pressure classes and facing types, IBR approved for boiler-grade piping connections.

Blind flange manufactured by IBR Fittings to ASME B16.5

Weld Neck (WN)

Tapered hub design for high-pressure, cyclic and high-temperature service with smooth stress transition to the pipe.

Slip-On (SO)

Economical fit-up flange, fillet welded inside and outside, suited to lower-pressure piping systems.

Blind (BL)

Used to seal the end of a piping system, valve or pressure vessel opening; available in all standard classes.

Socket Weld (SW)

For small-bore high-pressure piping, providing a smooth bore with the pipe inserted into a recessed socket.

Ring Type Joint (RTJ)

Metal-to-metal ring gasket seating for high-pressure / high-temperature critical service per ASME B16.5 Class 600 and above.

Lap Joint (LJ)

Used with stub ends for rotatable bolt-hole alignment and cost-effective alloy/CS combinations.

Pressure Class & Facing Reference per ASME B16.5
Pressure Class	Standard Facing	Size Range	Typical Application
Class 150	Raised Face (RF)	1/2" - 24" (ASME B16.5); 26" - 60" (ASME B16.47)	Low-pressure utility & water systems
Class 300	Raised Face (RF)	1/2" - 24" (ASME B16.5); 26" - 60" (ASME B16.47)	General process piping
Class 600	RF / RTJ	1/2" - 24" (ASME B16.5); 26" - 60" (ASME B16.47)	High-pressure steam & boiler piping
Class 900	RF / RTJ	1/2" - 24" (ASME B16.5)	High-pressure hydrocarbon & power piping
Class 1500	RTJ	1/2" - 24" (ASME B16.5)	High-pressure wellhead & severe service
Class 2500	RTJ	1/2" - 12" (ASME B16.5)	Extreme-pressure critical service

Need a Specific Size, Grade or Schedule?

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