Barred Tee

A barred tee is a tee or any fitting with a branch used in pipelines that is pigged and has a restriction bar welded internally preventing the pig from traveling down a branch connection.

Barred tee is a pipe fitting that is used in a pig launcher or receiver system in a piping system to ensure the pig could pass the branch safely.

Design considerations for barred tee

• The barred tee will be used when there is a requirement for pigging. Thus, many of its applications can be found in the pipeline or in the subsea field.
• The bar plates that welded internally at the branch are to avoid the pig from changing direction or getting stuck at the branch outlet.
• The design of the bar plates must be in sufficient quantity, thickness and adequately spaced to ensure the smoothness for the pig to run through the main pipe, and at the same time not affecting the flow that was meant to flow through the branch. Normal practice is to ensure that the opening in the branch pipeline after guided bars is not more than 40% of the main pipeline area.
• The size of the bars in the branch connection has to be small enough not to restrict the flow but large enough to sustain the pressure of the flow.
• To ensure the smoothness, the bar plates have to be a grind to suit the branch curvature. Any sharp edges, spatters and burs are required to be removed. This smoothness of the pigging process is important to protect the sensor of the pig from damage.
• Refer to Shell DEP 31.40.10.13-Gen Figure 4 above; the quantity of the bar plates start with two (2) pieces and increase as the ID of the branch increase.
• The bar plates ideally will be equally spaced.
• For larger tee (size 14 inches and above), there will be a bridge plate in the middle to support the bar stiffness when getting hit by the pig.
• The material of the bar plates commonly used the same as the tee material for weldability.
• Standard practice is to avoid welding of guide bars directly on the high-stress concentrated areas of the extrusion neck. Bar ends must be machined to fit the branch.
• Weld Repairs on Parent metal is prohibited.

Barred tees are pipe fittings with two outlets, one at 90 ° to the connection to the main line that has tiny holes. Barred tees can either be extruded or fabricated and are used to connect two pieces of pipe or fittings. Barred tee is used in pipelines that are pigged.

Difference between tee and barred tee

Tee or Tee connection in piping engineering is a very important pipe fitting and is frequently used to combine or divide a flow. Two types of Tee are available, Equal Tee and Reducing Tee. However, in pigged pipelines, one special type of tee connection is widely used which is known as Barred Tee or Pigged Tee.

So from the above discussion, we can summarize the following differences:

Lateral tees can either be extruded or fabricated and are used to connect two pieces of pipe or fittings. Lateral tees are used in pipelines that are pigged.

Parameter	Tee	Barred Tee
Definition	Standard Pipe Fitting	A special type of piping component
Manufacturing	Generally by Extrusion or forging	Mostly Fabricated
Use	Used in both piping and pipeline engineering	used in pipeline engineering near the pig launcher/receiver
Design Code / Standard	ASME B 16.9/MSS SP 75	Shell DEP 31.40.10.13-Gen or ISO 15590-2
Production Quantity	Large scale in bulk	Select small quantities (custom made)
Cost	Cheaper	Costlier than normal Tee

Tee vs Barred Tee

Tee is a type of fittings that allows fluid to flow on its main pipe and branch out. The branch can be designed equally the same size as the main pipe (known as Equal Tee), or smaller size than the main pipe (known as Reducing Tee).

Barred Tee is a special type of Tee that base from a normal tee (can be either equal tee or reducing tee) that at later stage, will be added with bar plates inside the branch outlet (From inside it looks like a steel cage) to restrict the pig from flowing from the header pipe into the branch pipes.

Materials

They are manufactured utilizing higher grade raw material, advanced machines and technologies.

• Abrasion resistant: Cearmic lined, Ceramic tile, Bi-metal clad pipe bending, Rare earth alloy wear-resistant pipe bending
• Carbon steel:
  • SA234 WPB, SA234 WPC,SA42 WPL6, SA42 WPL3
  • WP1. MSS-SP75, WPHY,WPHY 46,WPHY 52
  • WPHY 56,WPHY 60,WPHY 65, WPHY 70
  • DIN 1629 St37, RST37.2 St52, STPG38
• Stainless:
  • ASTM/ASME SA403 304,304L ,316, 316L, WP304L, 3 WP316 WP347 (H) ,WP317 (L),WP321.
  • DIN 1.4301, 1.4306, 1.4401, 1.4571
  • JIS SUS304,SUS304, SUS304L, SUS316, SUS316
• Alloy:
  • ASTM/ASME SA234 WP12, WP11,WP22, WP5, WP9, WP91, ASTM B361 GR.3003-6061, ASTM B366 UNS
  • N04400,N08800, N08825 N1001-N10276-N10665, WPT2-WPT12
  • ASTM 182 F1, F5, F6, F7, F9, F11, F12, F22, F51, 16MnR Cr5Mo
  • 12Cr1MoV 10CrMo910 15CrMo 12Cr2Mo1, St45.8

Buying Tips of pipe tee

What should buyers consider for bulk purchase of pipe tees?

• Type of pipe tee—whether welded or seamless
• Standard
• Size and dimension
• Wall thickness

• Material of construction
• Durability and Economical
• High pressure and temperature resistance
• Corrosion resistance etc.

Applications of pipe tee:

Pipe Tees are widely used in various commercial and industrial applications. Industrial applications include:

• Chemical processing
• Petroleum
• Pulp/paper
• Refining
• Textile
• Waste treatment, Marine

• Utilities/power generation
• Industrial equipment
• Automotive
• Gas compression
• Distribution industries
• Industrial plant fluid power systems.

Pipe tee FAQs

Pipe Tee is a type of pipe fitting which is T-shaped having two outlets, at 90° to the connection to the main line. It is a short piece of pipe with a lateral outlet. Pipe Tee is used to connect pipelines with a pipe at a right angle with the line. Pipe Tees are widely used as pipe fittings.

Hot forming

Tees using raw material with a bigger diameter than the finished product, the branch outlet is extruded from pipe while the main body is being pressed.

The outlet's wall thickness can also be adjusted as needed. Applied to Tees with large diameters, heavy wall thickness and/or special material with challenging workability that cannot be manufactured using the hydraulic bulge method.

Bevelled Ends

The ends of all buttweld fittings are bevelled, exceeding wall thickness 4 mm for austenitic stainless steel, or 5 mm for ferritic stainless steel. The shape of the bevel depending upon the actual wall thickness. This bevelled ends are needed to be able to make a "Butt weld".

Welding Bevel acc.to ASME / ANSI B16.9 and ASME / ANSI B16.28

ASME B16.25 covers the preparation of buttwelding ends of piping components to be joined into a piping system by welding. It includes requirements for welding bevels, for external and internal shaping of heavy-wall components, and for preparation of internal ends (including dimensions and dimensional tolerances).

Our in-hourse R&D team developed bevel ends equipment are good using in thickness 2mm to 20mm pipe fittings, guarantee high efficiency and high quality.

Send us your technical drawings

These weld edge preparation requirements are also incorporated into the ASME standards (e.g., B16.9, B16.5, B16.34).

ASME B16.25 (BUTT WELD ENDS)

ASME B16.25 sets standards for the preparation of the ends of components that need to be welded together.

Cut square or slight chamfer, at manufacturer’s option for :

• t ≤ 0.19” carbon steel or ferritic alloy steels
• t ≤ 0.12” austenitic alloy steels

Buttweld Fittings general

A pipe fitting is defined as a part used in a piping system, for changing direction, branching or for change of pipe diameter, and which is mechanically joined to the system.

There are many different types of fittings and they are the same in all sizes and schedules as the pipe.

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Pipe tee & Crosses size

Pipe Tee, LT, Lateral tee , RT, Reducing tee, Tee fittings accord to ANSI, ISO, JIS and DIN Standards, Measures 1/2 to 56 Inches.

Pattern	Weld	Seamless
Nominal size	1/2”-48” (DN15-DN1200)	1/2”-20” (DN15-DN500)
Wall thickness	2-100mm	2-50mm
Bend radius	SCH5S-SCH160 ,XXS	SCH5-SCH160
Type	Tee/reducing tee	Tee/reducing tee

Most common are tees with the same inlet and outlet sizes, but 'reducing' tees are available as well. it means the one or two ends are differ in dimension.due to thisdimension differ,the makes the tee fittings with the capacity to control the volume when requried.

Nominal pipe DN size	Outside Diameter at Bevel				Center to End
	D1		D2		C	M
	Series A	Series B	Series A	Series B
20×15	26.9	25	21.3	18	29	29
25×20 25×15	33.7 33.7	32 32	26.9 21.3	25 18	38 38	38 38
32×25 32×20 32×15	42.4 42.4 42.4	38 38 38	33.7 26.9 21.3	32 25 18	48 48 48	48 48 48
40×32 40×25 40×20 40×15	48.3 48.3 48.3 48.3	45 45 45 45	42.4 33.7 26.7 21.3	38 32 25 18	57 57 57 57	57 57 57 57
50×40 50×32 50×25 50×20	60.3 60.3 60.3 60.3	57 57 57 57	48.3 42.4 33.7 26.9	45 38 32 25	64 64 64 64	60 57 51 44
65×50 65×40 65×32 65×25	76.1(73) 76.1(73) 76.1(73) 76.1(73)	76 76 76 76	60.3 48.3 42.4 33.7	57 45 38 32	76 76 76 76	70 67 64 57
80×65 80×50 80×40 80×32	88.9 88.9 88.9 88.9	89 89 89 89	76.1(73) 60.3 48.3 42.4	76 57 45 38	86 86 86 86	83 76 73 70
90×80 90×65 90×50 90×40	101.6 101.6 101.6 101.6	- - - -	88.9 76.1(73) 60.3 48.3	- - - -	95 95 95 95	92 89 83 79
100×90 100×80 100×65 100×50 100×40	114.3 114.3 114.3 114.3 114.3	- 108 108 108 108	101.6 88.9 76.1(73) 60.3 48.3	- 89 76 57 45	105 105 105 105 105	102 98 95 89 86
125×100 125×90 125×80 125×65 125×50	139.7 139.7 139.7 139.7	133 - 133 133 133	114.3 101.6 88.9 76.1(73) 60.3	108 - 89 76 57	124 124 124 124 124	117 114 111 108 105
150×125 150×100 150×90 150×80 150×65	168.3 168.3 168.3 168.3 168.3	159 159 - 159 159	139.7 114.3 101.6 88.9 76.1(73)	133 108 - 89 76	143 143 143 143 143	137 130 127 124 121
200×150 200×125 200×100 200×90	219.1 219.1 219.1 219.1	219 219 219 -	168.3 139.7 114.3 101.6	159 133 108 -	178 178 178 178	168 162 156 152
200×200 200×150 200×125 200×100	273.0 273.0 273.0 273.0	273 273 273 273	219.1 168.3 139.7 114.3	219 159 133 108	216 216 216 216	208 194 191 184
300×250 300×200 300×150	323.9 323.9 323.9	325 325 325	273.0 219.1 168.3	273 219 159	254 254 254	241 229 219
300×125	323.9	325	139.7	133	254	216
350×300 350×250 350×200 350×150	355.6 355.6 355.6 355.6	377 377 377 377	323.9 273.0 219.1 168.3	325 273 219 159	279 279 279 279	270 257 248 238
400×350 400×300 400×250 400×200 400×150	406.4 406.4 406.4 406.4 406.4	426 426 426 426 426	355.6 323.9 273.0 219.1 168.3	377 325 273 219 159	305 305 305 305 305	305 295 283 273 264
450×400 450×350 450×300 450×250 450×200	457.2 457.2 457.2 457.2 457.2	478 478 478 478 478	406.4 355.6 323.9 273.0 219.1	426 377 325 273 219	343 343 343 343 343	330 330 321 308 298
500×450 500×100 500×350 500×300 500×250 500×200	508.0 508.0 508.0 508.0 508.0 508.0	529 529 529 529 529 529	457.2 406.4 355.6 323.9 273.0 219.1	478 426 377 325 273 219	381 381 381 381 381 381	368 356 356 346 333 324
550×500 550×450 550×400	559 559 559	- - -	508 457 406	- - -	419 419 419	406 394 381
600×550 600×550 600×450	610 610 610	- 630 630	559 508 457	- 530 480	432 432 432	432 432 419
650×600 650×550 650×500	660 660 660	- - -	610 559 508	- - -	495 495 495	483 470 457
700×650 700×600 700×550	711 711 711	- 720 -	660 610 559	- 630< -	521 521 521	521 508 495
750×700 750×650 750×600	762 762 762	- - -	711 660 610	- - -	559 559 559	546 546 533
800×750 800×700 800×650	813 813 813	- 820 -	762 711 660	- 720 -	597 597 597	584 572 572
850×800 850×750 850×700	864 864 864	- - -	813 762 711	- - -	635 635 635	622 610 597
900×850 900×800 900×750	914 914 914	- 920 -	864 813 762	- 820 -	673 673 673	660 648 635
950×900 950×850 950×800	965 965 965	- - -	914 864 813	- - -	711 711 711	711 698 686
1000×950 1000×900 1000×8500	1016 1016 1016	- 1020 -	965 914 864	- 920 -	749 749 749	749 737 724
1000×1000 1050×950 1050×900	1067 1067 1067	- - -	1016 965 914	- - -	762 762 762	711 711 711
1100×1050 1100×1000 1100×950	1118 1118 1118	- 1120 -	1067 1016 965	- 1020 -	813 813 813	762 749 737
1150×1100 1150×1050 1150×1000	1168 1168 1168	- - -	1118 1067 1016	- - -	851 851 851	800 787 775
1200×1150 1200×1100 1200×1050	1220 1220 1220	- 1220 -	1168 1118 1067	- 1120 -	889 889 889	838 838 813

Nominal pipe size		Outside Diameter at Bevel		Center to End
		D		C	M
DN	INCH	Series A	Series B
15	1/2	21.3	18	25
20	3/4	26.9	25	29
25	1	33.7	32	38
32	11/4	42.4	38	48
40	11/2	48.3	45	57
50	2	60.3	57	64
65	21/2	76.1(73)	76	76
80	3	88.9	89	86
90	31/2	101.6	―	95
100	4	114.3	108	105
125	5	139.7	133	124
150	6	168.3	159	143
200	8	219.1	219	178
250	10	273.0	273	216
300	12	323.9	325	254
350	14	355.6	377	279
400	16	406.4	426	305
450	18	457.2	478	343
500	20	508.0	529	381
550	22	559	―	419
600	24	610	630	432
650	26	660	―	495
700	28	711	720	521
750	30	762	―	559
800	32	813	820	597
850	34	864	―	635
900	36	914	920	673
950	38	965	―	711
1000	40	1016	1020	749
1050	42	1067	―	762	711
1100	44	1118	1120	813	762
1150	46	1168	―	851	800
1200	48	1220	1220	889	838