Page 246 - Estimators Piping Man Hour Manual

Section Eleven—TECHNICAL INFORMATION 221

WEIGHTS OF PIPING MATERIALS
The weight per foot of steel pipe is subject to the (Weight of Contents of a Tube = 0 X 0.3405 X
following tolerances: (/) - IT)' 2 pounds per foot)
G — Specific Gravity of Contents
SPECIFICATION TOLERANCE
T - Tube Wall Thickness, inches
STD WT + 5%, - 5%
A.S.T.M- A-33 /> = Tube Outside Diameter, inches
XS WT + 5%, - 5%
A.S.T.M. A-120
XXSWT +10%, -10%
The weight of Welding Tees and Laterals is for full
size fittings. The weight of reducing fittings is approxi-
SCH 10-120 +6.5%, -3.5% mately the same as for full size fittings.
A.S.T.M. A-106
SCH 140-160 +10%, -3.5% The weight of Welding Reducers is for one size re-
duction, and is approximately correct for other reduc-
tions.
A.S.T.M. A-158 12" and under +6.5%, -3.5%
A.S.T.M. A-206 over 12" +10%,, -5% Pipe Covering temperature ranges are intended as
A.S.T.M. A-280 a guide only and do not constitute a recommendation
for specific thickness of material.
Pipe Covering thicknesses and weights indicate aver-
API 5L AH sizes +6.5%, -3.5%
age conditions and include all allowance for wire,
cement, canvas, bands, and paint. The listed thick-
nesses of combination covering is the sum of the inner
and the outer layer thickness. When specific inner and
Weight of Tube = F X 10.6802 X 7' X (D - T) outer layer thicknesses are known, add them, and use
pounds foot
the weight for the nearest tabulated thickness.
T -- wall thickness in inches To find the weight of covering on Fittings, Valves,
or Flanges, multiply the weight, factor (light faced sub
D -- outside diameter in inches
script) by the weight per foot of covering used on
straight pipe. All Flange weights include the propor-
F = relative weight factor
tional weight of bolts or studs required to make up ail
joints.
The weight of tube furnished in this piping data is Lap Joint Flange weights include the weight of the
based on low carbon steel weighing 0.2833 pounds per lap.
cubic inch.
Welding Neck Flange weights are compinsated to
allow for the weight of pipe displaced by th( flange.
Relative Weight Factor F of various metals Pipe should be measured from the face of the Mange
All Flanged Fitting weights include the propor-
Aluminum = 0.35
tional weight of bolts or studs required to make up
Brass =1.12 all joints.
To find the approximate weight of Reducing Flanged
Cast iron =0.91
Fittings, subtract the weight of a full size Slip-On
Copper = 1.14 Flange and add the weight of reduced size
Slip-On Flange.
Lead = 1.44 Weights of valves of the same type may vary because
of individual Manufacturer's design. Listed valve
Ferritic Stainless Steel = 0.95
weights are approximate only. When it is possible
Austenitic Stainless Steel = 1.02 to obtain specific weights from the Manufacturer, such
weights should be used.
Steel =1.00
To obtain the approximate weight of Flanged End
Tin = 0.93 Steel Valves, add the weight of two Slip-On Flanges of
the same size and series to the weight of the corre-
Wrought Iron = 0.98 sponding Welding End Valves.
These pa^es reproduced through the courtesy of Gritmell Co., Inc.