Type [304L], [316L], socket welding, Class 3000 for 6 to 25 mm 1/4
to one inchIPS, Class 6000 for 32 and 40 mm 1 1/4 and 1 1/2 inches
IPS. Fittings for pipe 50 to 150 mm 2 inches to 6 inchesIPS: ASTM
A 403/A 403M, ASME B16.9, butt welding, seamless wrought stainless
steel Type [304L] [316L], Schedule 160.
**************************************************************************
NOTE: Use only one type of fitting for the entire
project.
**************************************************************************
b.
Stainless steel tubing: ASTM A 269, stainless steel, Type [304]
[304L] [316], seamless, annealed, with minimum 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
20,682 kPa 3000 psi service. Fittings shall have a minimum burst
strength of 139 MPa 20,000 psig; furnish laboratory burst test
reports. Do not use flareless fittings or bite type fittings. Do
not weld tubing. Brazed 20,682 kPa 3000 psi tubing fittings may
be used where flared fitting connections are not required for
equipment. Use FS QQ-B-654, Grade V, brazing alloy where tubing
or fitting or both tubing and fitting are stainless steel.
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
c.
Copper-nickel tube: MIL-T-16420, Composition 70-30,
temper-annealed, Type I - seamless, Class 3300 (22,750 kPa (gage)
3300 psig working pressure), Grade 2 (material with heat
identification). Fittings, Brazing: bronze or copper-nickel,
silver brazed ends, rated for not less than 20,682 kPa 3000 psi
working pressure. Limit brazed joints to required connections to
existing piping. Use welded joints for new and existing piping to
the maximum extent practical. Fittings, welding, 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 3300, 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 3300; however, for 6 mm 1/4 inch IPS, ASME
B16.11, Class 3000 dimensions may be used when approved by the
Contracting Officer. Fittings, welding, 50 to 80 mm 2 to 3 inches
IPS: ASME B16.9, butt welding, seamless wrought 70-30
SECTION 15212N
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