**************************************************************************
NOTE: Use only one type of fitting for the entire
project.
**************************************************************************
c.
Stainless steel tubing: ASTM A 269, stainless steel, Type [304]
[304L] [316], seamless, annealed, with wall thicknesses as
specified below. Fittings for tubing: stainless steel, Type
[304] [304L] [316], conforming to [SAE AS4841,] [SAE AS4842,][SAE
AS4842/1,][SAE AS4843,][SAE AS4843/1,][SAE AS4843/2,][SAE AS4875][
SAE AS4875/1,][SAE AS4875/2,][SAE J514,] flared type, suitable for
34,470 kPa 5000 psi service. Fittings shall have a minimum burst
strength of 138 MPa (gage) 20,000 psig; furnish laboratory burst
test reports. Do not use flareless fittings or bite type
fittings. Do not weld tubing.
MINIMUM WALL THICKNESS FOR STAINLESS STEEL TUBING
Size (mm O.D.)
Thickness (mm)
10
1.47
15
2.11
16
2.41
20
3.05
MINIMUM WALL THICKNESS FOR STAINLESS STEEL TUBING
Size (Inches O.D.)
Thickness (Inches)
3/8
.058
1/2
.083
5/8
.095
3/4
.120
d.
Copper-nickel tube: MIL-T-16420, Composition 70-30,
temper-annealed, Type I - seamless Class 6000 (41,364 kPa (gage)
6000 psig working pressure), Grade 2 (material with heat
identification), IPS outside diameter sizes. Fittings 40 mm 1 1/2
inches IPS and smaller: ASME B16.11, MIL-C-15726, forged
copper-nickel, socket welding, except that body wall thickness
shall not be less than the minimum wall thickness for the size
listed in MIL-T-16420 for Class 6000, and the average socket wall
thickness shall be 1.25 times, and the minimum socket wall 1.09
times the minimum wall thickness for that size listed in
MIL-T-16420 for Class 6000. Fittings 50 to 80 mm 2 to 3 inches
IPS: ASME B16.9, butt welding, seamless wrought 70-30
copper-nickel, with minimum wall thickness as listed for that size
in MIL-T-16420 for Class 6000.
2.9.2
High Pressure Air Piping
High pressure air piping for 20,682 kPa (gage) at 38 degrees C 3000 psig at
100 degrees F system shall conform to the following:
a.
Stainless steel pipe: ASTM A 312/A 312M, seamless stainless
steel, annealed Type [304L] [316L], Schedule 80 up to 25 mm one
inch IPS, Schedule 160 32 to 150 mm 1 1/4 to 6 inches IPS. Wall
thickness "schedule" and "weight" designations shall conform to
ASME B36.10M. Fittings for pipe 40 mm 1 1/2 inches IPS and
smaller: ASTM A 403/A 403M, ASME B16.11, forged stainless steel,
SECTION 15212N
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