CSI's Hastelloy® C-22® Standards

All Hastelloy® C-22® 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)

-PL20 µ-inch
(0.5 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
-SFN/ASanitary Finish*** / Mill FinishN/AUnpolished (Mill)
-PUN/AUnpolished (Mill)N/AUnpolished (Mill)

*20/32 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 (0.8 µm) maximum finish for sizes ½” to 4” diameter. The electropolishing process may increase the Ra values post electropolishing and have areas of preferential etching (e.g. frosting, shadowing, ect). Final Ra values for electropolished tubing and fitting shall not be used as criteria of acceptance for this product.

***Sanitary Finish: Offering finish better than traditional commercial grade tube finish. Suitable for applications in sanitary/high purity hygienic industries.

CSI Part Number Designator

Tolerances

Standard Tolerances in Tubing Dimensions
Welded or SeamlessODOD ToleranceWall ThicknessWall Thickness Tolerance
Seamless0.500 in
(12.7 mm)
+/- 0.005 in
(+/- 0.13 mm)
0.065 in
(1.65 mm)
+/- 15% of wall
Seamless0.750 in
(19.1 mm)
+/- 0.005 in
(+/- 0.13 mm)
0.065 in
(1.65 mm)
+/- 10% of wall
Seamless1.000 in
(25.4 mm)
+/- 0.005 in
(+/- 0.13 mm)
0.065 in
(1.65 mm)
+/- 10% of wall
Welded1.000 in
(25.4 mm)
+/- 0.010 in
(+/- 0.20 mm)
0.065 in
(1.65 mm)
+/- 12.5% of wall
Welded1.500 in
(38.1 mm)
+/- 0.010 in
(+/- 0.20 mm)
0.065 in
(1.65 mm)
+/- 12.5% of wall
Welded2.000 in
(50.8 mm)
+/- 0.010 i
(+/- 0.20 mm)
0.065 in
(1.65 mm)
+/- 12.5% of wall
Standard Tolerances in Fitting Dimensions
ODOD ToleranceWall ThicknessWall Thickness Tolerance
0.500 in
(12.7 mm)
+/- 0.010 in
(+/- 0.25 mm)
0.065 in
(1.65 mm)
+/- 15% of wall
0.750 in
(19.1 mm)
+/- 0.010 in
(+/- 0.25 mm)
0.065 in
(1.65 mm)
+/- 10% of wall
1.000 in
(25.4 mm)
+/- 0.010 in
(+/- 0.25 mm)
0.065 in
(1.65 mm)
+/- 10% of wall
1.500 in
(38.1 mm)
+/- 0.016 in
(+/- 0.40 mm)
0.065 in
(1.65 mm)
+/- 12.5% of wall
2.000 in
(50.8 mm)
+/- 0.016 in
(+/- 0.40 mm)
0.065 in
(1.65 mm)
+/- 12.5% of wall

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. This catalog does not intend to address criteria in the ASME BPE specification. The items offered within this catalog are in accordance with ASME BPE dimensions.

PRODUCT MARKING

  • All Hastelloy C-22 tubing will meet dimensional criteria and mechanical properties as set forth per the current ASTM B622 (seamless) or ASTM B626 (welded) specifications. Due to marking/finish/acceptance criteria obtainable in C-22, tubing will not be marked ASME-BPE.
  • All C-22 fittings ending in -PL will be marked with BPE SF1 surface finish reference, UNS number N06022, CSI logo, and alloy lot number.
  • All C-22 fittings ending in -P25 will be marked with BPE SF6 surface finish reference.