CSI's AL-6XN® Alloy Standards

All AL-6XN® tubing and fittings supplied by CSI shall be provided to the following criteria.

Surface Finish Options

Finish CodeProduct Contact Surface

(Max Ra)*

Product Contact Surface Finish Treatment

(ID)

Non-Product Contact Surface

(Max Ra)

Non-Product Contact Surface Finish Treatment

(OD)

-P732 µ-inch
(0.8 µm)
Mechanical Polish / As drawn32 µ-inch
(0.8 µm)
Mechanical Polish / As drawn
-732 µ-inch
(0.8 µm)
Mechanical Polish / As drawn32 µ-inch
(0.8 µm)
Mechanical Polish / As drawn
-P2525 µ-inch
(0.6 µm)
Electropolished**32 µ-inch
(0.8 µm)
Mechanical Polish / As drawn

*32 µ-inch Max Ra is an approximate value and is not guaranteed. Surface finish roughness shall be physically examined for “P25” using a profilometer calibrated to standards traceable to NIST. Surface finish roughness shall NOT be subject to physical examination for “P7” or “7”.

**The interior surfaces shall be mechanically polished or as drawn to a 25 Ra µ-inch (0.6 µm) maximum finish for sizes ½ – 4 inch diameter (where available). The electropolishing process may increase the Ra values post electropolishing and have areas of preferential etching (e.g. frosting, shadowing, etc.). Final Ra values for electropolished tubing and fitting shall not be used as criteria of acceptance for this product.

CSI Part Number Designator

Mechanically Polished "-P7" and "-7" Designations, Dimensions & Surface Finish

Dimensions for Tubing with Finish Designation Type "-P7"
Tubing Description

(in)

ODWall Thickness
½ x 0.65 wall0.500 in
(12.7 mm)
0.065 in
(1.65 mm)
¾ x 0.65 wall0.750 in
(19.1 mm)
0.065 in
(1.65 mm)
1 x 0.65 wall1.000 in
(25.4 mm)
0.065 in
(1.65 mm)
1½ x 0.65 wall1.500 in
(38.1 mm)
0.065 in
(1.65 mm)
2 x 0.65 wall2.000 in
(50.8 mm)
0.065 in
(1.65 mm)
2½ x 0.65 wall2.500 in
(63.5 mm)
0.065 in
(1.65 mm)
3 x 0.65 wall3.000 in
(76.2 mm)
0.065 in
(1.65 mm)
4 x 0.83 wall4.000 in
(101.6 mm)
0.083 in
(2.11 mm)
Dimensions for Fittings with Finish Designation Type "-7"
Nominal Size

(in)

Squareness of Elbow or Tee BranchesWall Thickness
½90° ± 2°0.065 in
(1.65 mm)
¾90° ± 2°0.065 in
(1.65 mm)
190° ± 2°0.065 in
(1.65 mm)
90° ± 2°0.065 in
(1.65 mm)
290° ± 2°0.065 in
(1.65 mm)
90° ± 2°0.065 in
(1.65 mm)
390° ± 2°0.065 in
(1.65 mm)
490° ± 2°0.083 in
(2.11 mm)

Electropolished "-P25" Designation, Dimensional Tolerances & Surface Finish

Dimensional Tolerances for Tubing with Finish Designation Type "-P25"
Tubing Description

(in)

ODOD ToleranceWall ThicknessWall Thickness Tolerance
½ x 0.65 wall0.500 in
(12.7 mm )
±0.005 in
(±0.13 mm)
0.065 in
(1.65 mm)
±10% of wall
¾ x 0.65 wall0.750 in
(19.1 mm )
±0.005 in
(±0.13 mm)
0.065 in
(1.65 mm)
±10% of wall
1 x 0.65 wall1.000 in
(25.4 mm )
±0.005 in
(±0.13 mm)
0.065 in
(1.65 mm)
±10% of wall
1½ x 0.65 wall1.500 in
(38.1 mm )
±0.008 in
(±0.20 mm)
0.065 in
(1.65 mm)
±10% of wall
2 x 0.65 wall2.000 in
(50.8 mm )
±0.008 in
(±0.20 mm)
0.065 in
(1.65 mm)
±10% of wall
2½ x 0.65 wall2.500 in
(63.5 mm )
±0.010 in
(±0.25 mm)
0.065 in
(1.65 mm)
±10% of wall
3 x 0.65 wall3.000 in
(76.2 mm )
±0.010 in
(±0.25 mm)
0.065 in
(1.65 mm)
±10% of wall
4 x 0.83 wall4.000 in
(101.6 mm )
±0.015 in
(±0.38 mm)
0.083 in
(2.11 mm)
±10% of wall

These tolerances comply with ASME BPE part DT.

Dimensional Tolerances for Fittings with Finish Designation Type "-P25"
Nominal Size(in)OD ToleranceCatalog Length ToleranceMin Length of Straight TangentPerp. of Face to TangentFace to Face Squareness, Off AngleWall ThicknessWall Thickness Tolerance
½±0.005 in
(±0.13 mm)
±0.050 in
(±1.27 mm)
1.50 in
(38.10 mm)
0.005 in
(0.13 mm)
0.014 in
(0.36 mm)
0.065 in
(1.65 mm)
±0.005/-010 in
(±0.13/-0.25 mm)
¾±0.005 in
(±0.13 mm)
±0.050 in
(±1.27 mm)
1.50 in
(38.10 mm)
0.005 in
(0.13 mm)
0.018 in
(0.46 mm)
0.065 in
(1.65 mm)
±0.005/-010 in
(±0.13/-0.25 mm)
1±0.005 in
(±0.13 mm)
±0.050 in
(±1.27 mm)
1.50 in
(38.10 mm)
0.008 in
(0.20 mm)
0.025 in
(0.64 mm)
0.065 in
(1.65 mm)
±0.005/-010 in
(±0.13/-0.25 mm)
±0.008 in
(±0.20 mm)
±0.050 in
(±1.27 mm)
1.50 in
(38.10 mm)
0.008 in
(0.20 mm)
0.034 in
(0.86 mm)
0.065 in
(1.65 mm)
±0.005/-010 in
(±0.13/-0.25 mm)
2±0.008 in
(±0.20 mm)
±0.050 in
(±1.27 mm)
1.50 in
(38.10 mm)
0.008 in
(0.20 mm)
0.043 in
(1.09 mm)
0.065 in
(1.65 mm)
±0.005/-010 in
(±0.13/-0.25 mm)
±0.010 in
(±0.25 mm)
±0.050 in
(±1.27 mm)
1.50 in
(38.10 mm)
0.010 in
(0.25 mm)
0.054 in
(1.37 mm)
0.065 in
(1.65 mm)
±0.005/-010 in
(±0.13/-0.25 mm)
3±0.010 in
(±0.25 mm)
±0.050 in
(±1.27 mm)
1.75 in
(44.45 mm)
0.016 in
(0.41 mm)
0.068 in
(1.73 mm)
0.065 in
(1.65 mm)
±0.005/-010 in
(±0.13/-0.25 mm)
4±0.015 in
(±0.38 mm)
±0.050 in
(±1.27 mm)
2.00 in
(50.80 mm)
0.016 in
(0.41 mm)
0.086 in
(2.18 mm)
0.083 in
(2.11 mm)
±0.008/-012 in
(±0.20/-0.30 mm)

These tolerances comply with ASME BPE part DT.

The American Society of Mechanical Engineers (ASME) has prepared a standard intended for design, materials, construction, inspection, and testing of vessels, piping and related accessories such as pumps, valves and fittings for use in the biopharmaceutical industry, referred to as ASME BPE. Items with a “- P25” surface finish designation are the only standard fittings and tubing offered that are in accordance with ASME BPE dimensions and tolerances as stated in part DT. Due to the manufacturing processes, not all surface finish requirements can be met as stated in part SF.

Product Marking

All AL-6XN -P25 fittings will be marked with BPE SF6 surface finish reference, UNS number N08367, CSI logo, and alloy lot number.

AL-6XN Alloy Tubing Specifications

  • In compliance with ASTM A270/A249/B676 and ASME SA249/SB676
  • Full line stencil on tube OD
  • Plastic sleeved and capped on polished ID and OD tubing
  • Tubing provided in random lengths, not less that 17 feet. Lengths of 20 ft ± 1.0 inch are typical.
  • MTR provided with every order