Page 26 - Tyco-Grooved-Fire-Protection-Products-Installation-Handbook

24
GENERAL INFORMATION
Groove Specifications 7 of 8
Cut Groove Standard Specification For Steel And Other IPS Pipe
Nominal Pipe Size ANSI Inches DN
Pipe O.D. Inches (mm)
O.D.
Tolerance
+
-
216,3mm
200
8.516 (216,3)
0.063 (1,60)
0.031 (0,79)
8
200
8.625 (219,1)
0.063 (1,60)
0.031 (0,79)
10
250
10.750 (273,0)
0.063 (1,60)
0.031 (0,79)
12
300
12.750 (323,9)
0.063 (1,60)
0.031 (0,79)
Cut Groove
B A
OD C
T
D
1. The maximum allowable toler- ances for IPS pipe from square cut ends is 0.030 in. (0,76 mm) for sizes 1 to 3 inch (DN32 to DN80); 0.045 in. (1,14 mm) for sizes 4 to 6 inch (DN100 to DN150); and 0.060 in. (1,52 mm) for sizes 8 to 12 inch (DN200 to DN300).
2. Gasket Seating Surface “A” must be free from score marks, ridges, indentations, projec- tions, loose paint, scale, dirt chips, grease, and rust that would prevent a positive seal.
3. Groove Diameter “C” must be of uniform depth around the circumference of the pipe.
4. Groove Depth “D” is a reference dimension of the distance form the pipe outer surface to the groove bottom, with regards to groove concentricity about the pipe. This dimension is a refer- ence only. The actual dimension “C” must be maintained.
5. Minimum Wall Thickness “T” is the minimum wall thickness that should be cut grooved.
NOTE
Refer to Technical Data Sheet TFP1898 for more information.