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ASME B16.9 Steel Pipe Cross Fittings

ASME B16.9 cross is a pipe fitting used to connect four pipes together, and the connection is achieved by welding. It plays a role in diversion or confluence in the pipeline system and is an important connector in the pipeline layout.

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ASME B16.9 butt-weld cross is a pipe fitting used to connect four pipes together, and the connection is achieved by welding. It plays a role in diversion or confluence in the pipeline system and is an important connector in the pipeline layout.

A butt-weld cross usually has four interfaces, and the size and specifications of these interfaces are determined according to different pipeline requirements. The internal channel is designed reasonably to ensure that the fluid can flow smoothly in the cross and reduce pressure loss. For example, in some industrial pipeline systems, the interfaces of the butt-weld cross may be precisely processed according to the outer diameter of the pipeline, and the interfaces will be specially treated to facilitate welding operations.

Specification of ASME B16.9 Cross Pipe Fittings

Shape Type Equal and Reducing Cross Tee
Size Range 1/2” – 80” / DN15 – 2000
Thickness Schedule SCH 10, SCH 40, SCH 80, SCH 160, XXS
Carbon Steel Material ASTM A234 WPB/WPC, ASTM A420 WPL6, A860 WPHY 42 / 46 / 56 / 60 / 65
Alloy Steel Material ASTM A234 WP11 / WP12 / WP 5 / WP9 / WP91 / WP92,15CrMoG, 12Cr1MoVG, 12Cr5Mo, 1Cr5Mo, Cr9Mo, 10CrMo910, 12CrMo4-515CrMoG, 12Cr1MoVG, 12Cr5Mo, 1Cr5Mo, Cr9Mo, 10CrMo910, 12CrMo4-5
Stainless Steel Material ASTM A403 WP304/304L/304H, 316/316L, 310S, 317, 347, 904L, A815 S32205, S31803, 32750, 32760

ASME B16.9 Steel Pipe Cross Fittings Drawing & Dimensions

Nominal Size Outside Diameter at Bevel Center to End
DN NPS OD1×OD2 C M
15 1/2 21.3 25 25
20 3/4 26.7 29 29
25 1 33.4 38 38
32 11/4 42.2 48 48
40 11/2 48.3 57 57
50 2 60.3 64 64
65 21/2 73.0 76 76
80 3 88.9 86 86
90 31/2 101.6 95 95
100 4 114.3 105 105
125 5 141.3 124 124
150 6 168.3 143 143
200 8 219.1 178 178
250 10 273.0 216 216
300 12 323.8 254 254
350 14 355.6 279 279
400 16 406.4 305 305
450 18 547.0 343 343
500 20 508.0 381 381
550 22 559.0 419 419
600 24 610.0 432 432
650 26 660.0 495 495
700 28 711.0 521 521
750 30 762.0 559 559
800 32 813.0 597 597
850 34 864.0 635 635
900 36 914.0 673 673
950 38 965.0 711 711
1000 40 1016.0 749 749
1050 42 1067.0 762 711
1100 44 1118.0 813 762
1150 46 1168.0 851 800
1200 48 1219.0 889 838
1300 52 1321.0 965 914
1400 56 1422.0 1041 965
1500 60 1524.0 1118 1016
1600 64 1626.0 1194 1092
1700 68 1727.0 1270 1168
1800 72 1829.0 1320 1245
1900 76 1930.0 1422 1320
2000 80 2032.0 1499 1397

Application fields of butt-welded cross joints

Petrochemical industry
In the production process of petrochemical industry, butt-welded cross joints are widely used in the construction of various pipeline networks. For example, in the refining process of crude oil, from the crude oil delivery pipeline to the connecting pipelines between various distillation towers and reactors, butt-welded cross joints can connect different process pipelines to realize the transportation and distribution of crude oil, various fractions and chemical reagents.
Construction engineering field
Butt-welded cross joints are also used in the water supply and drainage system and heating system of buildings. In the water supply and drainage system, butt-welded cross joints can connect the main water supply pipe with the branch water pipes on different floors or in different areas to ensure the water demand of various parts in the building. In the heating system, it can distribute the hot water of the heating pipe to the radiator pipes in each room.
Power industry
In the steam-water pipe system of thermal power plants, butt-welded cross joints are indispensable pipe fittings. It is used to connect steam pipes, condensate pipes, etc. to ensure the smooth circulation of steam and water recycling in the power generation process.

Installation of butt-welded cross

Before installing the butt-welded cross, the welding part must be cleaned first to remove impurities such as oil and rust. At the same time, the appropriate welding materials and welding processes should be selected according to the materials of the pipe fittings and pipelines. For example, for stainless steel butt-welded crosses, matching stainless steel electrodes should be used, and processes suitable for stainless steel welding such as argon arc welding should be adopted to ensure the welding quality.

The matching accuracy of the butt-welded cross and the pipeline is very important. When matching, the flatness and concentricity of the interface should be ensured to avoid misalignment. If the matching is inaccurate, uneven welding stress may occur during the welding process, thereby affecting the welding quality, and even leakage and other problems may occur during the operation of the pipeline.

After welding, the welding part should be visually inspected to see if there are any welding defects, such as pores, slag inclusions, and incomplete penetration. At the same time, according to the project requirements, non-destructive testing, such as radiographic testing and ultrasonic testing, may also be required to ensure that the internal quality of the welding part meets the requirements.

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