Category: Threaded Fittings

Union Fitting

ISO Approved Stainless Steel Threaded Union Manufacturer In India, Standard Specification Of ASTM A105 Screwed Unions And Dimensions.

ASME B16.11 Union

Stainless Steel Threaded Union

Carbon Steel Threaded Union

What Is A Threaded Union?
How Does A Threaded Union Work?
What Is A Union Fitting Used For?
Threaded Reducing Union Specification
Carbon Steel Threaded Union Price List
MSS-SP-83 Union Pressure Rating Class
ASME B16.11 Union Dimensions
Stainless Steel Threaded Union Weight Chart
ASME B16.11 Threaded Union Tolerance Formula
Various Types Of ASME B16.11 Threaded Union

ASME B16.11 Threaded Union

MSS-SP-83 Union

Copper Threaded Union

What Is A Threaded Union?

ASME B16.11 Union is a threaded pipe fitting that is used to connect two pipes or two more fittings at each end. The Stainless Steel Threaded Union is the most common form of union with a male thread, female thread and a nut in the middle. The Threaded Union Dimensions differ according to the pipe system it connects with and the standards mandated. The different materials call for different strengths and mechanical properties of the union in various types such as the Alloy Steel Screwed Union and the ASTM A182 SS Threaded Unions. A Screwed Union has the advantage of dismantling as needed. Unlike most other pipe fitting connections, the Forged Threaded Union can be fitted without welding. There are different standards such as the BS3799 Screwed Forged Union and the Forged Threaded Union which have different physical and mechanical properties.

How Does A Threaded Union Work?

The most used is the ASME B16.11 Union and its variations like the Carbon Steel Threaded Union. Their strength is increased in the Threaded Forged Union by the forged production methods. Due to the strength, the Forged Threaded Union can be applied in smaller pipe diameters up to 4 inches but with high stress or pressure environments. They can withstand different pressure levels according to their dimensions and their material makes such as the Screwed Union 3000LB Threaded.

What Is A Union Fitting Used For?

The ASME B16.11 Union for instance can withstand pressures up to 3000lbs in connections. The threads in Forged Screwed Union make them better choice for application where maintenance demands dismantling of pipe fittings from time to time. Some high strength applications require special material unions such as the Duplex Steel Threaded Unions which are very much corrosion resistant and have a high tensile and yield strength. These are used in ordinary water lines for domestic purpose to much higher precision systems like in the petroleum industry piping.

Check 300# Carbon Steel Threaded Union Male/ Female Price List, Schedule Chart Of ASME B16.11 Threaded Union As Per ANSI B16.11.

Threaded Reducing Union Specification

Specification :	ASME B16.11 Union
Pressure Rating	Threaded Fittings = Class 2000, Class 3000, Class 6000
Type Of Pipe systems	45 Deg Elbow, Equal tee, Full Coupling, Reducing Tee, 90 Deg Elbow, Half Coupling, Street Elbow, Bull Plug, Boss, Union (Male/Female), Lateral Outlet, 45 Lateral Tee, Equal Cross, Pipe Cap, Branch Outlets, Swage Nipple.
Material	Stainless Steel (ASTM-182) Carbon Steel (ASTM-105) Alloy Steel (ASTM-182) Low Alloy Steel (ASTM-350) Duplex Steel Cooper Nickel
Thread Connections	ASME B16.11 (Socket Welding and Threaded), MSS-SP-83 (Class Unions), ASME B16.3 (Malleable Iron Fittings), ASME B16.4 ( Gray Iron Fittings), ASME B16.39 (Malleable Iron Unions), ASME B16.34 (Valves — Flanged), ASME B16.39 (Malleable Iron Pipe Unions, 150#, 250#, Or 300#).
Standards	ASME B16.11 (American Standard), Bs3799, MSS SP 79, JIS B2302, MSS-SP-97 (Threadolet), MSS-SP-83 (Union), ASME B36.19 (Nipple)
Types Of Thread	NPT, BSPP, BSPT, PF, PT, MPT
Applications	Oil and Gas Chemical Power station Water Pipeline Noncritical Applications Fire Protection
Advantages	Simple Usage Easy installation Economic as cheaper
Size	Threaded Fittings = ½” – 4”

Carbon Steel Threaded Union Price List

Size	Class	Material	Price In US($)
Hexagonal Union: 1 NPS	Class 3000	ASTM A105	$2.43
Hexagonal Union: 1/2 NPS	Class 3000	ASTM A105	$0.87
Hexagonal Union: 1/3 NPS	Class 3000	ASTM A105	$1.7
Hexagonal Union: 1/4 NPS	Class 3000	ASTM A105	$1.97
Hexagonal Union: 2 NPS	Class 3000	ASTM A105	$4.86

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Please note this is an approx Price of 1 Inch And 2 Inch Threaded Brass Union in India. For final ASME B16.11 Stainless Steel Threaded Union Price List Please Call on +91 - 22 - 67437342 or drop an Email to info@rajtilakmetal.com.

Accept All Small And Large Orders Of ASME B16.11 Union In Mumbai, India, Temperature Ratings Of 3/4 Threaded Brass Unions.

MSS-SP-83 Union Pressure Rating Class


ASME B16.11 Union Temperature
Temperature		Class
		150	300
			1/4 - 1 inch.	1 1/4 - 2 inch.	2 1/2 - 3 inch.
(oF)	(oC)		1/4 - 1 inch.	1 1/4 - 2 inch.	2 1/2 - 3 inch.
-20 to 150	-29 to 66	300	2000	1500	1000
200	93	265	1785	1350	910
250	121	225	1575	1200	825
300	149	185	1360	1050	735
350	177	150	1150	900	650
400	204	-	935	750	560
450	232	-	725	600	475
500	260	-	510	450	385
550	288	-	300	300	300

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ASME B16.11 Union Dimensions

Dimensions Of ASME B16.11 Union In Millimeter
NPS (Normal Pipe Sizes)	Minimum Pipe End	Diameter Of Socket Bore	Minimum Of Socket Wall	Water Way Bore	Laying Length	Minimum Of Male Flange	Minimum Nut	Maximum Threads Per 25.4	Minimum Bearing	Minimum Depth of Socket	Length Assem. Nominal	Clear Assem. Nut
	A	B	C	D	E	F	G	H	J	K	L	N
1/8	21.8	10.92 10.67	3.17	6.83 6.43	22.4 19.0	3.17	3.17	16	1.24	9.6	41.1	49.0
¼	21.8	14.22 13.97	3.30	9.85 9.45	22.4 19.0	3.17	3.17	19	1.24	9.6	41.4	49.0
3/8	25.9	17.78 17.53	3.48	13.92 13.51	26.9 20.6	3.43	3.43	14	1.37	9.6	46.0	55.0
½	31.2	21.84 21.59	4.06	17.47 17.07	26.9 20.6	3.68	3.68	14	1.50	9.6	49.0	57.0
¾	37.1	27.18 26.92	4.27	21.79 21.39	31.8 25.4	4.06	4.06	11	1.68	12.7	56.9	67.0
1	45.5	34.04 33.78	4.95	28.14 27.74	34.3 26.2	4.57	4.44	11	1.85	12.7	62.0	79.0
11/4	54.9	42.67 42.42	5.28	35.76 35.36	40.6 32.5	5.33	5.21	11	2.13	12.7	71.1	94.0
11/2	61.5	48.77 48.51	5.54	41.61 41.20	42.2 34.0	5.84	5.59	10	2.31	12.7	75.5	111.0
2	75.2	61.47 61.21	6.05	52.53 52.12	45.3 37.3	6.60	6.35	10	2.69	15.8	86.1	132.0
21/2	91.7	74.17 73.66	7.65	64.72 64.31	61.7 52.1	7.49	7.11	8	3.07	15.8	102.4	148.0
3	109.2	90.17 89.66	8.31	77.67 77.27	63.8 53.6	8.25	8.00	8	3.53	15.8	109.0	175.0

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Stainless Steel Threaded Union Weight Chart

ASME B16.11 Threaded Union Tolerance Formula

ANSI B16.11 American Standard Dimensional Tolerances
"A" - Threaded Center To Bottom	For Size 1/8" And 1/4"	± 0.03"
	3/8", 1/2" And 3/4"	± 0.06"
	1", 1-1/4", 1-1/2" And 2"	± 0.08"
	2-1/2", 3", And 4"	± 0.10"
"B" - Threaded Bore Diameter	For Size 1-1/2" And Smaller	+ 0.020" - 0.000"
"B" - Threaded Bore Diameter	2", 2-1/2", 3" And 4"	+ 0.025" - 0.000"
"C" - Threaded Wall Thick.	Min. = 1.09 T (But Not Less Than 5/32") T = Wall Thickness Of Nominal Pipe Sizes
"D" - Bore Diameter Of Pipe Fitting	For Size 2" And Smaller	± 0.030"
"D" - Bore Diameter Of Pipe Fitting	2-1/2", 3" And 4"	± 0.060"
"E" - Threadeds- Bottom To Bottom - Full Couplings	For Size 1/8" And 1/4"	± 0.06"
	3/8", 1/2" And 3/4"	± 0.12"
	1", 1-1/4", 1-1/2" And 2"	± 0.16"
	2-1/2", 3", And 4"	± 0.20"
"F" - Bottom Of Threaded To Opposite Face - ANSI B16.11 Half Couplings	For Size 1/8" And 1/4"	± 0.03"
	3/8", 1/2" And 3/4"	± 0.06"
	1", 1-1/4", 1-1/2" And 2"	± 0.08"
	2-1/2", 3", And 4"	± 0.10"
"G" - Gap Of Welding	Approx. 0.06" Before Welding Recommended Gap
"H" - Min. Flat	Min. Flat = 0.75 X Min. Threaded Wall Thick.