Name: Forged Threaded Street Elbow
Brand: Cunimet Alloy International

Product Overview

Forged Threaded Street Elbow

The Forged Threaded Street Elbow (also called a service elbow) differs from a standard threaded elbow in that it has one male NPT external thread on one outlet and one female NPT internal thread on the other. A standard threaded elbow carries female NPT threads at both outlets and requires a separate nipple to connect it to a female-threaded fitting. The street elbow eliminates this by carrying a male thread at one end that can be screwed directly into a female-threaded fitting outlet, making the assembly more compact.

Cunimet Alloy International manufactures forged street elbows in 90-degree and 45-degree bend angles to ASME B16.11 in Class 2000# and 3000#. The male NPT end and the female NPT end are both precision-cut on CNC turning centres to ASME B1.20.1 tolerances and individually go/no-go gauge inspected to ensure fit with standard NPT fittings on both ends.

ASME B16.11 ASME B1.20.1 (NPT) 1/8" to 2" NPS 2000# • 3000# 90° • 45° Male + Female NPT

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ASMEStandardB16.11

M/FThread ConfigMale + Female NPT

1/8–2"Size RangeNPS

2000#Min. ClassAlso 3000#

90/45°Bend AnglesBoth Available

Technical Dimensions

Street Elbow — ASME B16.11 Dimensions

“A” = Centre-to-face (female end). “B” = Centre-to-end (male end). For 90° street elbows. Dimensions for 45° available on request. All dimensions in millimetres.

NPS	Pipe O.D. (mm)	Centre-to-Face “A” — Female End (mm)		Centre-to-End “B” — Male End (mm)		TPI
NPS	Pipe O.D. (mm)	Class 2000#	Class 3000#	Class 2000#	Class 3000#	TPI
1/8"	10.3	21	22	17	17	27
1/4"	13.7	24	25	19	19	18
3/8"	17.1	27	29	21	22	18
1/2"	21.3	33	35	25	27	14
3/4"	26.7	38	41	29	32	14
1"	33.4	48	52	35	38	11.5
1-1/4"	42.2	57	61	41	44	11.5
1-1/2"	48.3	64	67	46	48	11.5
2"	60.3	76	79	54	57	11.5

Dimensions nominal per ASME B16.11. 45° street elbow dimensions available on request. Both male and female ends gauged to ASME B1.20.1 before dispatch. All dimensions in millimetres.

Product Comparison

Street Elbow vs Standard Threaded Elbow

Street Elbow (Male/Female)

One male NPT external thread + one female NPT internal thread
Male end screws directly into a female fitting outlet — no nipple required
More compact — saves one joint and reduces overall assembly length

Standard Threaded Elbow (Female/Female)

Both outlets carry female NPT internal threads
Requires a separate nipple to connect to an adjacent female-threaded fitting
More joints — each additional nipple is an additional potential leak point

Available Materials

Material Grades for Street Elbows

Grade 01

Stainless Steel 304 / 316

Austenitic stainless steel street elbows for direction changes in chemical, pharmaceutical and process screwed piping where the male end eliminates the need for a separate nipple between the elbow and the adjacent female-threaded fitting.

ASTM A182 F304ASTM A182 F316ASME B16.11

Grade 02

Duplex Steel

High-strength duplex alloy street elbows for compact direction changes in offshore instrument piping, chemical plant screwed connections and desalination utility lines where both the male and female thread surfaces must resist chloride corrosion.

ASTM A182 F51UNS S31803UNS S32205

Grade 03

Super Duplex Steel

Premium super duplex street elbows with PREN greater than 40 for compact direction changes in seawater service, offshore topsides and aggressive offshore screwed piping where maximum corrosion resistance at both thread types is required.

ASTM A182 F53UNS S32750UNS S32760

Applications

Where Street Elbows Are Used

01

Compact Instrument Manifolds

Building compact instrument manifold assemblies where a street elbow connects directly to a gauge valve, transmitter or sample valve body female port without a separate nipple, reducing the number of joints and the overall manifold footprint.

02

Space-Constrained Pipe Runs

Direction changes in congested pipe racks and instrument tray areas where the shorter assembly length of a street elbow versus an elbow-plus-nipple combination is required to fit within available space between fittings and structural members.

03

Valve Station Connections

Connecting threaded isolation valves directly to screwed process lines using a 90-degree street elbow where the valve body carries a female NPT inlet and the process line exit requires a direction change at the valve location.

04

Chemical & Utility Lines

Direction changes in chemical dosing, steam tracing, compressed air and utility screwed piping where the male end of the street elbow screws directly into an existing female tee or coupling outlet to change direction without an additional fitting.

Threaded Fittings Range

Forged Threaded Street Elbow

Forged Threaded Street Elbow

Street Elbow — ASME B16.11 Dimensions

Street Elbow vs Standard Threaded Elbow

Street Elbow (Male/Female)

Standard Threaded Elbow (Female/Female)

Material Grades for Street Elbows

Stainless Steel 304 / 316

Duplex Steel

Super Duplex Steel

Where Street Elbows Are Used

Compact Instrument Manifolds

Space-Constrained Pipe Runs

Valve Station Connections

Chemical & Utility Lines

Other Forged Threaded Fittings

Threaded 90° Elbow

Threaded 45° Elbow

Barrel Nipple

Swage Nipple

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