Sanitary pipe and tubing 1

[joeswoes]

Does anyone know the dimensions of either s.s. sanitary pipe or sanitary tubing ? Are the ID's the same, but different wall thicknesses ? Is sanitary pipe the same as steel pipe, based on schedule (10,20,40,..) ? When would one use one over the other ? What is the most popular type of sanitary piping in pharmaceutical or semiconductor ?

 

[mgp]

For US applications you should use

ASME BPE (Bioprocessing equipment) code.

In europe it is common to use

ISO 1127 with surface requirements or
DIN 11850

plus various standards for fittings, clamps etc.

None of these use schedule type wallthickness definition.

Note that fitting dimensional standards very often vary from "common" fitting standards, partly because very often they are provided with extended ends for orbital welding.

For bolted joints the most common types are
Sterile clamps (e.g.

http://www.triclover.com)

Sterile Flanges (e.g.

http://www.bbs-systems.com)

Sterile Unions (e.g.

http://www.bbs-systems.com)

hope this helps

Regards
Mogens

 

[greg87]

Sizes for sanitary ss tubing, like other tubing, is based on the outside diameter. ID varies by wall thickness – gauge. A typical wall thickness for sizes under 2.5 inch is 0.062 inches. mgp has provided you some excellent sources of the detailed information.
Sanitary ss tube is the standard (vs. pipe) in Pharmaceutical, semiconductor, and food for a number of reasons. It is available with polished (and electropolished) interior surfaces which is critical to maintaining sanitary conditions. It is fabricated with very close tolerances which make it ideal to produce very high quality, repeatable welds using automatic oribital welding machines. It is made with very high quality stainless alloys, which again contribute to making high quality, corrosion resistant welds. Because tubing is superior in these aspects, the components (valves, connections, instruments, etc) that have been developed over the years for sanitary systems are all built for tubing systems.
For semiconductor applications, polypropylene and PVDF tubing/pipe have widespread application, were metal ions are an issue.