Name: Forged Threaded 45 Degree Elbow
Brand: Cunimet Alloy International

Forged Threaded 45 Degree Elbow – SS 304 316 Duplex Super Duplex

Product Overview

Forged Threaded 45° Elbow

The Forged Threaded 45 Degree Elbow redirects a piping run by 45 degrees using screwed NPT or BSP female threads at both outlets. The 45-degree angle provides a gentler directional change than a 90-degree elbow, reducing flow turbulence and pressure drop at the bend. This fitting is used wherever a piping route requires an angular offset or where two 45-degree elbows are specified in place of a single 90-degree elbow for improved flow conditions.

Threaded connections allow the piping to be assembled and disassembled without cutting or welding, making this fitting the preferred choice for instrument manifolds, maintenance-accessible utility lines and any installation where the fitting may need to be replaced or relocated during the system's service life. Cunimet Alloy International manufactures these elbows through closed-die forging, ensuring a dense grain structure at the elbow body. All threads are CNC-cut to ASME B1.20.1 (NPT) tolerances and 100% go/no-go gauge inspected 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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ASME Standard B16.11

45° Bend Angle Full Bore, Female NPT

1/8–4" Size Range NPS

2000# Min. Class Also 3000# & 6000#

3 Material Grades SS / Duplex / S.Duplex

Technical Dimensions

Threaded 45° Elbow — ASME B16.11 Dimensions

“A” = Centre-to-Face dimension measured from the intersection of both outlet axes to the face of either threaded outlet. Both outlets are equal. Thread form per ASME B1.20.1 (NPT). All dimensions in millimetres.

NPS	Pipe O.D. (mm)	Centre-to-Face “A” (mm)			Thread Form	TPI
NPS	Pipe O.D. (mm)	Class 2000#	Class 3000#	Class 6000#	Thread Form	TPI
1/8"	10.3	16	17	17	NPT	27
1/4"	13.7	17	19	21	NPT	18
3/8"	17.1	19	21	24	NPT	18
1/2"	21.3	22	25	29	NPT	14
3/4"	26.7	25	29	35	NPT	14
1"	33.4	30	35	44	NPT	11.5
1-1/4"	42.2	35	40	52	NPT	11.5
1-1/2"	48.3	38	44	57	NPT	11.5
2"	60.3	44	51	64	NPT	11.5
2-1/2"	73.0	51	60	76	NPT	8
3"	88.9	60	70	89	NPT	8
4"	114.3	73	86	108	NPT	8

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

Pressure Classes

2000# vs 3000# vs 6000# — Selection Guide

Class 2000#

Lightest-wall threaded class, equivalent to Schedule 80 pipe wall. Suitable for moderate-pressure utility services, drain and vent lines and instrument tapping points where the full 3000# wall thickness is not required by the piping specification.

Sch 80 EquivalentUtility & Instrument Lines

Class 3000#

Standard high-pressure threaded class, equivalent to Schedule 160 pipe wall. The most widely specified class for general industrial, oil & gas and chemical process threaded fittings. Suitable for the majority of high-pressure threaded piping applications globally.

Sch 160 EquivalentGeneral Process

Class 6000#

Heaviest-wall threaded class, equivalent to Double Extra Heavy (XXH) pipe wall. Specified for very high-pressure service, hydraulic power circuits and applications where project specifications or client standards require the maximum available wall thickness in a threaded fitting.

XXH EquivalentHigh-Pressure Hydraulic

Available Materials

Material Grades for Threaded 45° Elbows

Grade 01

Stainless Steel 304 / 316

Austenitic stainless steel for chemical, food, pharmaceutical and water treatment service. SS 316 provides enhanced resistance to chloride pitting and crevice corrosion, making it the standard choice for coastal, marine and offshore applications where SS 304 would be susceptible to corrosion.

ASTM A182 F304 ASTM A182 F316 ASME B16.11

Grade 02

Duplex Steel

Austenitic-ferritic dual-phase alloy with approximately twice the yield strength of standard austenitic stainless steel and excellent resistance to stress corrosion cracking in chloride-bearing environments. Used in offshore, desalination and chemical plant threaded piping systems.

ASTM A182 F51 UNS S31803 UNS S32205

Grade 03

Super Duplex Steel

Premium super duplex alloy with PREN greater than 40 for the most demanding corrosive environments including offshore topsides, subsea production systems, seawater injection and desalination plants where standard duplex grades are insufficient.

ASTM A182 F53 UNS S32750 UNS S32760

Quality & Compliance

Standards, Testing & Documentation

Applicable Standards

Standard	Description
ASME B16.11	Forged Fittings, Socket-Welding & Threaded — primary dimensional standard
ASTM A182	Material specification for forged alloy and stainless steel fittings
ASME B1.20.1	Pipe Threads, General Purpose (NPT) — thread form, dimensions and tolerances
BS EN 10226	BSP pipe threads for pressure-tight joints — available on request
MSS SP-25	Standard marking system for valves, fittings and flanges
EN 10204	3.1 Mill Test Certificate 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 and Charpy impact where specified
Hardness Testing	Brinell or Vickers per ASTM A182 requirements
Thread Gauging	100% NPT 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 45° Elbows Are Used

01

Piping Layout Offsets

Routing small-bore process and utility lines around structural members, cable trays and equipment bases where a 45-degree offset is required and threaded connections provide ease of adjustment during installation.

02

Instrument Manifolds

Building pressure and flow instrument manifolds where 45-degree elbows direct instrument tubing from process tapping points to transmitters, gauges and sample valves at convenient angles.

03

Chemical Process Lines

Small-bore corrosive service lines in chemical plants where 45-degree threaded elbows in Stainless Steel or Duplex Steel provide the required directional change with screwed connections for easy maintenance access.

04

Utility & Service Piping

Steam tracing, compressed air, nitrogen, plant water and lubricating oil distribution networks where threaded 45-degree elbows provide practical, cost-effective angular direction changes in accessible piping.

Threaded Fittings Range

Forged Threaded 45° Elbow

Forged Threaded 45° Elbow

Threaded 45° Elbow — ASME B16.11 Dimensions

2000# vs 3000# vs 6000# — Selection Guide

Class 2000#

Class 3000#

Class 6000#

Material Grades for Threaded 45° Elbows

Stainless Steel 304 / 316

Duplex Steel

Super Duplex Steel

Standards, Testing & Documentation

Applicable Standards

Quality Tests Performed

Where Threaded 45° Elbows Are Used

Piping Layout Offsets

Instrument Manifolds

Chemical Process Lines

Utility & Service Piping

Other Forged Threaded Fittings

Threaded 90° Elbow

Threaded Equal Tee

Threaded Cross

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