ASME B16.9 crosses, also known as four-way pipe crosses, are critical pipe fittings used to connect four pipes at a right angle. It enables multi-directional fluid or gas flow in piping systems. HT PIPE is a leading stockist and global exporter with over 15 years of expertise in international trade. We supply pipes, plates, round bars, and a comprehensive range of pipe fittings, flanges, and valves. Contact us now for free quotes and personalized product information.
Dimensional Tolerances for ASME B16.9 Crosses
Centerline-to-Face Length (C Dimension) Tolerance: For NPS 1/2 to NPS 24 (DN 15 to DN 600), the tolerance is ±1/8 inch (±3.2 mm). For NPS 26 to NPS 48 (DN 650 to DN 1200), the tolerance is ±3/16 inch (±4.8 mm).
Welding End OD Tolerance: ±0.010 inch (±0.25 mm) for NPS up to NPS 2 (DN 50). ±0.020 inch (±0.51 mm) for NPS 2-12 (DN 50-300). ±0.030 inch (±0.76 mm) for NPS 14 and above (DN 350 and above).
Wall Thickness Tolerance: Minimum wall thickness must not be less than 90% of the specified minimum wall thickness. Maximum wall thickness is not specified but must not interfere with welding or pipe alignment.
Bevel Angle Tolerance: ±2.5° from the specified 37.5° angle. Root face dimension tolerance is ±1/32 inch (±0.79 mm).
Dimensional Verification Tests
Visual Inspection: Checking for surface defects and general dimensional alignment of the branches.
Dimensional Measurement: Using precision tools (e.g., calipers, micrometers, tape measures, coordinate measuring machines) to verify centerline-to-face length, welding end OD, wall thickness, bevel angle, and root face dimension.
Radiographic Testing (RT) or Ultrasonic Testing (UT): For welded crosses, RT or UT is used to detect internal weld defects that could affect dimensional stability or structural integrity.
Material Test Reports (MTRs): Providing documentation of the base material's chemical composition and mechanical properties, which indirectly ensures dimensional compatibility.
ASME B16.9 Crosses Dimension
|
Nominal Pipe Size (NPS) |
DN |
Outside Diameter at Bevel |
Center-to-End |
|
|
Run, C |
Outlet, M [Notes (1) and (2)] |
|||
|
1/2 |
15 |
21.3 |
25 |
25 |
|
3/4 |
20 |
26.7 |
29 |
29 |
|
1 |
25 |
33.4 |
38 |
38 |
|
1 1/4 |
32 |
42.2 |
48 |
48 |
|
1 1/2 |
40 |
48.3 |
57 |
57 |
|
2 |
50 |
60.3 |
64 |
64 |
|
2 1/2 |
65 |
73.0 |
76 |
76 |
|
3 |
80 |
88.9 |
86 |
86 |
|
3 1/2 |
90 |
101.6 |
95 |
95 |
|
4 |
100 |
114.3 |
105 |
105 |
|
5 |
125 |
141.3 |
124 |
124 |
|
6 |
150 |
168.3 |
143 |
143 |
|
8 |
200 |
219.1 |
178 |
178 |
|
10 |
250 |
273.0 |
216 |
216 |
|
12 |
300 |
323.8 |
254 |
254 |
|
14 |
350 |
355.6 |
279 |
279 |
|
16 |
400 |
406.4 |
305 |
305 |
|
18 |
450 |
457 |
343 |
343 |
|
20 |
500 |
508 |
381 |
381 |
|
22 |
550 |
559 |
419 |
419 |
|
24 |
600 |
610 |
432 |
432 |
|
26 |
650 |
660 |
495 |
495 |
|
28 |
700 |
711 |
521 |
521 |
|
30 |
750 |
762 |
559 |
559 |
|
32 |
800 |
813 |
597 |
597 |
|
34 |
850 |
864 |
635 |
635 |
|
36 |
900 |
914 |
673 |
673 |
|
38 |
950 |
965 |
711 |
711 |
|
40 |
1000 |
1016 |
749 |
749 |
|
42 |
1050 |
1067 |
762 |
711 |
|
44 |
1100 |
1118 |
813 |
762 |
|
46 |
1150 |
1168 |
851 |
800 |
|
48 |
1200 |
1219 |
889 |
838 |
