Name: Forged Threaded 90 Degree Elbow
Brand: Cunimet Alloy International

Forged Threaded 90 Degree Elbow – SS 304 316 Duplex Super Duplex

Product Overview

Forged Threaded 90° Elbow

The Forged Threaded 90 Degree Elbow is used to change the direction of a piping run by 90 degrees using screwed NPT or BSP connections, without welding. Both outlets carry female pipe threads that engage with the male-threaded pipe ends, enabling assembly and disassembly of the piping system without cutting or welding. The threaded elbow is used extensively in instrumentation, utility and process piping where the system may need to be broken for maintenance.

Cunimet Alloy International manufactures forged threaded 90-degree elbows through closed-die forging followed by precision CNC threading to ASME B1.20.1 (NPT) tolerances. The forged body provides superior strength over cast alternatives, particularly at the elbow crotch area. All threaded elbows are dimensionally inspected to ASME B16.11 and thread-gauged before dispatch.

ASME B16.11 ASME B1.20.1 (NPT) 1/8" to 4" NPS 2000# • 3000# • 6000# Female Threads Both Ends

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ASMEStandardB16.11

90°Bend AngleFull Bore, Female NPT

1/8–4"Size RangeNPS

2000#Min. Pressure ClassAlso 3000# & 6000#

3Material GradesSS / Duplex / S.Duplex

Technical Dimensions

Threaded 90° Elbow — ASME B16.11 Dimensions

“A” = Centre-to-Face dimension, measured from the centre of the elbow to the face of either thread outlet. Both outlets are equal. Threads per ASME B1.20.1 (NPT). All dimensions in millimetres.

NPS	Pipe O.D. (mm)	Centre-to-Face “A” (mm)			Thread Type	Threads per Inch (TPI)
NPS	Pipe O.D. (mm)	Class 2000#	Class 3000#	Class 6000#	Thread Type	Threads per Inch (TPI)
1/8"	10.3	21	22	22	NPT	27
1/4"	13.7	24	25	27	NPT	18
3/8"	17.1	27	29	32	NPT	18
1/2"	21.3	33	35	41	NPT	14
3/4"	26.7	38	41	51	NPT	14
1"	33.4	48	52	64	NPT	11.5
1-1/4"	42.2	57	61	76	NPT	11.5
1-1/2"	48.3	64	67	83	NPT	11.5
2"	60.3	76	79	95	NPT	11.5
2-1/2"	73.0	89	95	114	NPT	8
3"	88.9	111	114	140	NPT	8
4"	114.3	140	146	178	NPT	8

Dimensions are nominal per ASME B16.11 latest edition. BSP threads to BS EN 10226 also available on request. All dimensions in millimetres.

Pressure Classes

2000# vs 3000# vs 6000# — Selection Guide

Class 2000#

Lightest-wall threaded fitting class. Equivalent to Schedule 80 pipe wall. Used for moderate-pressure utility services, instrument lines and general process applications where full 3000# rating is not required.

Sch 80 EquivalentUtility & Instrument Lines

Class 3000#

Standard high-pressure threaded fitting class. Equivalent to Schedule 160 pipe wall. The most widely specified class for general industrial, oil & gas and chemical process threaded fittings worldwide.

Sch 160 EquivalentGeneral Process

Class 6000#

Heaviest-wall threaded fitting class. Equivalent to Double Extra Heavy (XXH) pipe wall. Specified for very high-pressure service, hydraulic systems and applications where maximum strength margins are required.

XXH EquivalentHigh-Pressure Service

Available Materials

Material Grades for Threaded 90° Elbows

Grade 01

Stainless Steel 304 / 316

Austenitic stainless for chemical, food, water and process service threaded connections. SS 316 provides enhanced resistance to chloride pitting compared to SS 304 and is the preferred grade for marine and coastal environments.

ASTM A182 F304ASTM A182 F316ASME B16.11

Grade 02

Duplex Steel

High-strength austenitic-ferritic alloy with superior stress corrosion cracking resistance in chloride environments. Twice the yield strength of standard austenitic grades, enabling weight savings in high-pressure threaded systems.

ASTM A182 F51UNS S31803UNS S32205

Grade 03

Super Duplex Steel

Premium alloy with PREN greater than 40 for threaded connections in highly corrosive chloride environments including offshore, desalination, seawater injection and subsea chemical injection systems.

ASTM A182 F53UNS S32750UNS S32760

Quality & Compliance

Standards, Testing & Documentation

Applicable Standards

Standard	Description
ASME B16.11	Forged Fittings, Socket-Welding & Threaded — dimensional standard
ASTM A182	Material specification for forged alloy and stainless steel fittings
ASME B1.20.1	Pipe Threads, General Purpose (NPT) — thread form and tolerances
BS EN 10226	Pipe threads for pressure-tight joints (BSP) — available on request
MSS SP-25	Standard marking for valves, fittings and flanges
EN 10204	3.1 MTC standard; 3.2 with TPI on request

Quality Tests Performed

Test	Method / Scope
Chemical Analysis	OES per ASTM A182 for each heat of material
Mechanical Testing	Tensile, yield, elongation, Charpy impact where specified
Hardness Testing	Brinell or Vickers per ASTM A182 requirements
Thread Gauging	100% NPT thread go/no-go gauge inspection per ASME B1.20.1
PMI	100% XRF Positive Material Identification on request
Dimensional Inspection	100% per ASME B16.11 centre-to-face and body dimensions

Applications

Where Threaded 90° Elbows Are Used

01

Instrumentation Piping

Connecting pressure transmitters, level gauges, temperature wells and flow instruments to process lines where threaded connections allow easy removal for calibration and maintenance.

02

Utility Services

Steam tracing lines, compressed air distribution, plant water and nitrogen purge piping where threaded connections provide a practical, cost-effective installation and maintenance solution.

03

Chemical Process Lines

Small-bore process piping in chemical plants where Class 3000# or 6000# Stainless Steel or Duplex Steel threaded elbows are specified for resistance to process fluid corrosion.

04

Hydraulic Systems

High-pressure hydraulic oil and fluid power circuits where Class 6000# threaded elbows in stainless or duplex steel provide the required pressure rating in a compact, screwed configuration.

Threaded Fittings Range

Forged Threaded 90° Elbow

Forged Threaded 90° Elbow

Threaded 90° Elbow — ASME B16.11 Dimensions

2000# vs 3000# vs 6000# — Selection Guide

Class 2000#

Class 3000#

Class 6000#

Material Grades for Threaded 90° Elbows

Stainless Steel 304 / 316

Duplex Steel

Super Duplex Steel

Standards, Testing & Documentation

Applicable Standards

Quality Tests Performed

Where Threaded 90° Elbows Are Used

Instrumentation Piping

Utility Services

Chemical Process Lines

Hydraulic Systems

Other Forged Threaded Fittings

Threaded 45° Elbow

Threaded Equal Tee

Threaded Cross

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