Steel Pipe Nipple

Steel Pipe nipple is a short piece of pipe usually with threads in both ends, for connecting of two other fittings


Pipe Nipples

The length of nipple generally is specified by the overall length with threads part. Also it may have a hexagonal section in the center for a wrench to grasp (we call hex nipple), or it may simply made from a piece of pipe (As above picture we call it barrel nipple or pipe nipple).

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Hex Nipple

Close Nipple
A close nipple almost has all length with threads; when screwed tightly between two female fittings, very little of the nipple remains exposed.


A close nipple can only be unscrewed by gripping one threaded end with a pipe wrench which will damage the threads and necessitate replacing the nipple, or by using a specialty tool known as a nipple wrench (or known as an internal pipe wrench) which grips the inside of the pipe, leaving the threads undamaged.

When the nipple ends are of two different sizes it is called a reducer or unequal nipple.
Threads used on nipples are BSP, BSPT, NPT, NPSM and Metric.

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Other kinds of Nipples
Casing Nipple and Tubing  Steel Nipple
Refers to the short length of the Casing and Tubing Pipe, normally length in 2ft, 4ft, 8ft, 10ft or customized.

Flange Nipple
Flange nipple can be considered as nipple and flange conjunction. The nipple is specifically placed in the flange and then welded to the pipe end.
The flange could be move on the nipple by screwing.

Standard Specification of Stainless Steel Threaded Hex Nipple, Threaded Pipe Nipple

Dimensions : ASME 16.11, MSS SP-79, MSS SP-95, 83, 95, 97, BS 3799

Size : 1/8″NB TO 4″NB IN

Class : 3000 LBS, 6000 LBS, 9000 LBS

Type : Threaded (S/W) & SCREWED (SCRD) – NPT, BSP, BSPT

Form : Threaded Hex Nipple, Threaded Pipe Nipple, Threaded Reducing Nipple

Manufacturing Standards of Threaded Hex Nipple ASME B16.11

ASME: ANSI B16.9, ANSI B16.28, MSS-SP-43
DIN: DIN2605, DIN2615, DIN2616, DIN2617, DIN28011
EN: EN10253-1, EN10253-2

ASTM A403 – ASME SA403 – Standard Specification for Wrought Austenitic Screwed Threaded 45 Degree Elbow

Asme B16.9 – Factory-Made Wrought Screwed Threaded 45 Degree Elbow

ASME B16.25 – Screwed Threaded Fittings ASME B16.28 – ‘Wrought Steel Screwed Threaded 45 Degree Elbow

MSS SP-43 – ‘ Wrought and Fabricated Threaded 45 Degree Elbow for Low Pressure, Corrosion Resistant Applications

 

Surface Facing Types and Codes
Beveled large end-Plain small end BLE/PSE
Beveled large end-Thread small end BLE/TSE
Plain large end-Threaded small end PLE/TSE
Beveled both end BBE
Plain both end PBE
Threaded both end TBE

Materials and Grade

Carbon Steel :

ASTM A105 ,A350 LF2

Alloy steel :

ASTM A182 F11/F12/F22/F5/F9/F91

Stainless Steel:

ASTM A182 F304/ F304L/ F316/ F316L/F310

Product Categories : Forged Steel Pipe Fitting > Steel Nipple