Summary:
Manufactured to stringent ASME BPE and ASTM A270 S2 specifications,
this high quality tubing is 100% bore-scoped and mechanically
polished on both the ID and OD. Finishing processes guarantee
specific ID and OD Ra values for customers application,
minimizing surface anomalies. Moreover, all A270-BPE series
tubing is cleaned in a Class 100 Cleanroom (Fed 209E),
significantly reducing customer inspection requirements
prior to installation. The finest quality stainless steel
materials are made to melt criteria and formed by the
manufacturering processes to assure highest weld seam
integrity, to meet the most demanding applications. Our
tubing is available in 1/2" (12.7 mm) to 6"
(152.40 mm) OD in 20ft. (6.1 m) lengths.
Specification
(link)
Tubing shall be manufactured to A270-BPE
316L meeting or exceeding the requirements of ASME BPE
and ASTM A270 S2. All tubing will be 100% bore-scoped
and mechanically polished to 20 µ-in Ra (0.5 µm)
ID maximum and 30 µ-in Ra (0.8 µm) OD maximum
surface roughness measured per ASME/ANSI B46.1 with the
profilometer reading at 90 degrees to major polishing
pattern, with ends prepared for orbital welding and the
tube ID cleaned for oxygen service.
Materials
• 316L available from stock. 6-MOLY and other alloys
available on request.
Mechanical
Tests
To ensure the highest surface quality in all of our sanitary
tubing, manufacturers routinely go beyond the requirements
of ASTM A269 and A270 by performing the full battery of
ASTM bend and deformation tests required by ASME SA249
as well as additional deformation tests developed by the
manufacturers. The tests, combined with specific raw material
requirements, eddy current testing at the tube mill, 100%
bore-scoping prior to mechanical polish, and tighter OD
and wall tolerances allow us to provide a more consistent
superior quality product to the marketplace.
Annealing
• Hydrogen bright annealed in line to 1900°F
(1040°C) minimum and rapidly quenched.
Cleaning
Most A270-BPE high purity tubing is available from stock
with ID cleaned for oxygen service. Other ID cleaning
procedures are available including thermocouple cleaning
per ASTM A632 or Nitric Acid & deionized water rinse.
The de-ionized water system guarantees less than 50 ppb
TOC with an average of 10 ppb and a resistivity up to
18 M. They also utilize 99.9999% pure Nitrogen which is
filtered to 0.003 µm at the point of use. Cleaning
and packaging are performed in a certified Class 100 Cleanroom.
Surface Finish
Surface finish is 20 µ-in Ra (0.5 µm) ID maximum,
30 µ-in Ra (0.8 µm) OD maximum measured per
ASME/ANSI B46.1 with the profilometer reading at 90 degrees
to major polishing pattern.
Packaging
As a final step in maintaining purity standards following
cleaning, our A270-BPE tubing is packaged using protective
6 mil poly sleeving along with air tight plastic end caps.
The tubing is then placed in wood boxes for maximum protection
during shipment. Other packaging is available on customer
request.
High Purity
Stainless Steel Tubing
Chemical Composition
Sanitary Products 
Tubes 
