What is threaded union?

What is threaded union?

Threaded union is primarily used for maintenance and installation purposes. It is a screwed joint design and it consists of three interconnected pieces. Two internally threads and a centerpiece that draws the ends together when rotated.

Size	Class	Dimension	Specification
1/4″ to 4″	2000, 3000, 6000, 9000	ANSI B 16.11	ASTM A 182 ASME SA182

Stainless Steel Threaded Union

ASTM / ASME SA A182 F304, 304H, 309, 310, 316, 316L, 317L, 321, 347, 904L

Carbon Steel Threaded Union

ASTM/ ASME A 105, ASTM/ ASME A 350 LF 2

Alloy Steel Threaded Union

ASTM / ASME A182 F1/ F5/ F9/ F11/ F22/ F91

Nickel Alloy Threaded Union

ASTM / ASME SB 336 UNS 2200 (NICKEL 200) , UNS 2201 (NICKEL 201 ) , UNS 4400 (MONEL 400 ) , UNS 8020 ( ALLOY 20 / 20 CB 3 ) , UNS 8825 INCONEL (825) , UNS 6600 (INCONEL 600 ) , UNS 6601 (INCONEL 601) , UNS 6625 (INCONEL 625) , UNS 10276 (HASTELLOY C 276)

Copper Alloy Steel Threaded Union

ASTM / ASME SB 111 UNS NO. C 10100 , C 10200 , C 10300 , C 10800 , C 12000, C 12200, C 70600 , C 71500

ASTM / ASME SB 466 UNS NO. C 70600 ( CU -NI- 90/10) , C 71500 ( CU -NI- 70/30)

Duplex Steel Threaded Union

ASTM A 182 – F 51, F53, F55 S 31803, S 32205, S 32550, S 32750, S 32760

Product name : threaded union

1/8″ to 3 ” class 3000 and 1/2″ to 2″ class 6000 Class 3000 　 1/8 1/4 3/8 1/2 3/4 1 1 1/4 1 1/2 2 2 1/2 3 A 1 11/16 1 11/16 1 27/32 2 2 5/16 2 7/16 2 7/8 3 3 1/2 4 1/2 4 7/16 B 1 31/64 1 31/64 1 11/16 1 15/16 2 3/8 2 25/32 3 23/64 3 23/32 4 27/64 5 15/64 6 5/32 C 53/64 53/64 1 1 3/16 1 15/32 1 25/32 2 7/32 2 35/64 3 1/16 3 9/16 4 9/32 D 25/32 25/32 31/32 1 3/32 1 5/32 1 3/8 1 45/64 1 7/8 2 1/16 2 3/8 2 7/16 E 7/16 7/16 7/16 7/16 9/16 9/16 9/16 9/16 11/16 7/8 1 F 0.420 0.555 0.690 0.855 1.065 1.330 1.675 1.915 2.406 2.906 3.535   0.430 0.565 0.700 0.865 1.075 1.340 1.685 1.925 2.416 2.921 3.550 　 Class 6000 　 1/8 1/4 3/8 1/2 3/4 1 1 1/4 1 1/2 2 　 A 1 11/15 1 27/32 2 2 5/16 2 7/16 2 7/8 3 3 1/2 4 1/8 B 1 31/64 1 11/16 1 15/16 2 3/8 2 25/32 3 23/64 3 23/32 4 27/64 5 15/64 C 53/64 1 1 3/16 1 15/32 1 25/32 2 7/32 2 35/64 3 1/16 3 9/16 D 25/32 31/32 1 3/32 1 5/32 1 3/8 1 45/64 1 7/8 2 1/16 2 3/8 E 7/16 7/16 7/16 9/16 9/16 9/16 9/16 11/16 7/8 F 0.420 0.555 0.690 0.855 1.065 1.330 1.675 1.915 2.406   0.430 0.565 0.700 0.865 1.075 1.340 1.685 1.925 2.416 Note: “C” dimension is across octagon corners or a diameter as applicable.The 2.1/2″ and 3″ 3000LB and 2″ 6000LB sizes have octagonal male and female ends; the other sizes are round.

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