Bulkhead Union

Bulkhead Union
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A Bulkhead Union is a pipe fitting used to connect pipes to a tank. To install it, you cut a hole in the tank, insert the fitting body, and secure it with a lock nut. This nut tightens against a gasket, creating a watertight seal. There are different types, such as the Bulkhead Reducing Union, which is a straight tube fitting with ends of different sizes. It has a threaded body that is held in place with a bulkhead nut.

The Stainless Steel Bulkhead Union is popular for providing a smooth connection from one side to the other. It’s all-metal body adds strength, and it’s fully threaded design helps with positioning through a wall. The Welding Bulkhead Union is often used in straight tube connections where the fitting needs to be welded. These unions are typically used for allowing liquid to flow freely inside a tank, connecting plumbing lines, or draining drums. They also work well as distribution points in piping systems. The Bulkhead Union Fitting allows full water flow and can connect flexible pipes using male adapters.

When purchasing the right SS 304 Bulkhead Union for your needs, consider the following:

  • Check the thread size before buying.
  • Make sure you know the correct diameter needed for the Brass Bulkhead Union.
  • Ensure the quality and strength of the 316 Stainless Steel Bulkhead Fittings before finalizing your purchase.

Here are some tips to make purchasing a bulkhead union easier. First, determine the thread size of the fitting. Next, make sure you know the correct diameter for distribution outlets. It’s also important to consider the strength and quality of the pipe fitting before making your choice.

Bulkhead Union (Round Body – SW) pipe fittings are easy to adapt and install. These fittings have several benefits, such as providing a watertight seal with plastic pipes, preventing leaks and stress cracks, and allowing free flow of liquids for filling, draining, or use in tanks. Bulkhead fittings are also commonly used in piping systems for distribution.

We supply Bulkhead Union (Round Body – SW) in various grades, diameters, and thicknesses according to customer drawings and specifications.

Bulkhead Union Specification

STANDARDDIN 2353/ ISO 8434-1
WORKING PRESSURE(MEDIUM)L SERIES – 100 BAR TO 500 BAR
(LOW) LL SERIES – 100 BAR
(HEAVY)S SERIES – 200 BAR TO 800 BAR
SERIESL- MEDIUM PRESSURE, LL- LOW PRESSURE, S- HIGH PRESSURE
CONNECTIONSTUBE TO TUBE
EQUIVALENT BRANDSHY-LOK, HYDAC, PARKER, STAUFF, DK-LOK, VOSS, SMC
SIZE RANGEL SERIES – 6L TO 42L
LL SERIES – 4LL TO 12LL
S SERIES – 6S TO 38S
MATERIALCS, MS, SS 304L, SS 304, ALUMNIUM, SS 316L, SS 316, BRASS, SS 316TI ( 1.4571), DUPLEX, COPPER, INCONEL, MONEL, 6MO, SUPER DUPLEX, HASTELLOY, 904L, TITANIUM, ALLOY 20
SURFACESTAINLESS STEEL – SHORT BLASTED FINISH, EXPORT BRIGHT FINISH, ELECTROPLATED FINISH
 CARBON STEEL -TRIVALENT ZINC PLATED, YELLOW PLATTING, BLACK PHOSPHATED,
BODY TYPEBAR, FORGED STOCK
TEMPERATURESTEEL – (-40* C TO 120*C), STAINLESS STEEL – (-60*C TO 400*C), BRASS – (-60*C TO 175*C)
DESIGNATORSTAINLESS STEEL – ASTM A 276 /A182
STEEL – JIS G4051 S20C, ASTM 108/A105, G3201 SF440A, S45C
BRASS – ASTM B282 ALLOY 37700, ASTM B16 UNS C36000, C3771, JIS H3250 C3604, JIS H3250 C3771.

Bulkhead Union Fitting Material & Grades

MaterialGrade
Stainless SteelASTM A182/ ASTM A 276 F321H, 304L, 316, 321, 317, 310S, 316L, 347H, 316Ti, 904L 347, 304H, 304, 310,
Carbon SteelASTM A105/ ASME SA 105/ EN 1A SERIES
Duplex & Super Duplex SteelASTM A182/ASTM A276 F61, F51, F45, F60, F55, F53, F44, Duplex 2205, Super Duplex 2507
CopperASTM B88 Type K, Type L
Nickel AlloyASTM B564 Nickel 201 (UNS No. N02201), Nickel 200 (UNS No. N02200), Monel 500 (UNS No. N05500), Monel 400 (UNS No. N04400), Inconel 825 (UNS No. N08825), Inconel 800 (UNS No. N08800), Inconel 625 (UNS No. N06625), Inconel 600 (UNS No. N06600), Hastelloy C276 (UNS No. N10276), Inconel 601 (UNS No. N06601), Alloy 20 (UNS No. N08020)
BrassASTM B16 UNS C36000, ASTM B282 ALLOY 37700, JIS H3250 C3604, JIS H3250 C3771, C3771, Cz121 Brass, Alloy 360, IS 319 Grade 1 Brass, IS 319 Grade 2 Brass, BS 2874 Cz121, BS 2872 Cz121, ASTM B124 Alloy 377
TitaniumASTM B348 / ASME SB 348 Grade 5, Grade 2
Copper NickelASME SB467/467M Cupro Nickel 90/10, Cuni 70/30

Types of Bulkhead Union Fitting

Bulkhead Union

Bulkhead Union

Bulkhead Adapter

Bulkhead Adapter

Bulkhead Reducing Union

Bulkhead Reducing Union

stainless-steel-bulkhead-union

Stainless Steel Bulkhead Union

Bulkhead Union

SS 304 Bulkhead Union

Brass Bulkhead Union

Brass Bulkhead Union

316 Stainless Steel Bulkhead Fittings

316 Stainless Steel Bulkhead Fittings

bulkhead-union

Bulkhead Union Fittings

Bulkhead Female Connector

Brass Bulkhead Union

Bulkhead Male Connector

Bulkhead Male Connector

Reducing Bulkhead Male Connector

Reducing Bulkhead Male Connector

Weld Bulkhead Union

Weld Bulkhead Union

Bulkhead Union Dimensions

For Fractional Tube
D(in)H2(in)H1(in)L
1/87/167/1635.5
1/165/165/1625.2
1/49/161/241
3/161/27/1637.5
5/165/89/1643
1/27/813/1651.50
3/811/165/845
5/8115/1652
7/81-1/41-3/1655.4
3/41-1/81-1/1653.6
11-1/21-3/864.8

 

For Metric Tubes
LH2(in)H1(in)H3(in)
32121414
31.212143
36161818
33.6141616
42222424
37192222
42.6252727
47.5303030
42.6252727
53323535
53323535
57.5384242

Bulkhead Union Pressure Rating

Outside
Diameter
Of tube
(inch)		Tube wall thickness (Swg/inch)
30/.01233/.01022/.02814/.08018/.04820/.03616/.06412/.104
1/16465385680  865  
1/8  345 600515805 
1/4  265 465315635 
5/16  205 380275515 
3/8  170s480275205380 
1/21   380205155275450
5/8   310170120240380
3/4   245140105195300
7/8   22512085170240
1       

Dimensions of Bulkhead Reducing Union

Dimensions of Bulkhead Reducing Union
Body MaterialConnection 1 – SizeConnection 1 – TypeConnection 2 – SizeConnection 2 – Type
Brass3/8 inTube Fitting1/4 inTube Fitting
316 SS3/8 inTube Fitting1/4 inTube Fitting
Brass1/4 inTube Fitting1/8 inTube Fitting
316 SS1/4 inTube Fitting1/8 inTube Fitting
Brass1/2 inTube Fitting1/4 inTube Fitting
316 SS1/2 inTube Fitting1/4 inTube Fitting
Brass1/2 inTube Fitting3/8 inTube Fitting
316 SS1/2 inTube Fitting3/8 inTube Fitting
Alloy 4003/8 inTube Fitting1/4 inTube Fitting
Alloy C-2761/2 inTube Fitting1/4 inTube Fitting
Alloy 4001/2 inTube Fitting1/4 inTube Fitting
Alloy C-2761/4 inTube Fitting1/8 inTube Fitting
Alloy 4001/4 inTube Fitting1/8 inTube Fitting
Alloy C-2763/8 inTube Fitting1/4 inTube Fitting
Alloy 4001/2 inTube Fitting3/8 inTube Fitting
Alloy C-2761/2 inTube Fitting3/8 inTube Fitting

 

Size Chart of Straight Bulkhead Union

Body MaterialSize 2Size 1
Brass3/16″3/16″
Alloy C-2761/8″1/8″
Alloy 4001/16″1/16″
Stainless Steel 3161/4″1/4″
 5/16″5/16″
 3/8″3/8″
 1/2″1/2″
 5/8″5/8″
 3/4″3/4″
 1″1″
 1-1/4″1-1/4″
 1-1/2″1-1/2″
 2″2″
 3mm3mm
 4mm4mm
 6mm6mm
 8mm8mm
 10mm10mm
 12mm12mm
 14mm14mm
 15mm15mm
 16mm16mm
 18mm18mm
 20mm20mm
 25mm25mm
 38mm38mm

 

Size Chart of Straight Bulkhead Union

  1. Tank Connections
  2. Plumbing Systems
  3. Liquid Flow Control
  4. Distribution Outlets
  5. Drum Drainage
  6. Irrigation Systems
  7. Chemical Processing

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