Page 73 - APPLIED PROCESS DESIGN FOR CHEMICAL AND PETROCHEMICAL PLANTS, Volume 1, 3rd Edition

Fluid Flow 57
r T

A
A
J_ 1 'r f
c
D
l
J_
1--B-----.J 1--B----...J �B----l l--a--1
COUPLING REDUCING HALF CAP
COUPLING COUPLING

SQUARE HEAD HEX HEAD ROUND HEAD HEX HEAD FLUSH
PLUG PLUG PLUG BUSHING BUSHING
Figure 2-4A. Forged steel threaded pipe fittings, WOG (water, oil or gas service). Note: the working pressures are always well above actual plant
operating levels. Pressure classes 3000 psi and 6000 psi, sizes lt in. through 4 in. nominal. By permission, Ladish Co., Inc.

90° ELBOWS 45o ELBOWS TEES CROSSES

l � 1

±ffl' T _l_
· � H �
H
LATERALS COUPLINGS CAPS
Figure 2-48. Forged steel socket weld fittings, WOG (water, oil or gas service). Note: the working pressures are always well above actual plant
operating levels and are heavy to allow for welding. Pressure classes 3000 psi and 6000 psi, sizes li. in. through 4 in. nominal. Do not weld on
malleable iron or cast iron fittings. (By permission, Ladish Co., Inc.)

American Standards Association piping pressure class-
Nominal Pipe Size O.D. Inches I.D. Inches es are:
Inches Schedule 40 80 40 80
---·--�· ASA Pressure Class Schedule No. of Pipe
Y. 1.050 1.050 0.824 0.742
l 1.315 1.315 1.049 0.957 :<::; 250 lbs./sq. in. 40
l� 1.900 1.900 1.610 1.500 300-600 80
2 2.375 2.375 2.067 1.939 900 120
3 3.500 3.500 3.068 2.900 1500 i60
4 4.500 4.500 4.026 3.826 2500 (f.i in.-6 in.) XX (double extra strong)
2500 (8 in. and larger) 160
See Appendix for other sizes.