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Home > 316L Stainless Steel Press Fit Pipe and Fittings > Technical Information

Technical Information - 316L Stainless Steel Press Fit Pipe System

Technical Information - 316L Stainless Steel Press Fit Pipe System

Experience the benefits of 316L Stainless Press Fit Pipe and Fittings
  • No Welding/No Hot Work
  • Fast to install – each join is up to 10 times faster then welded stainless
  • Reduced labour costs
  • No special work permits required
  • Pressure rated up to 580 psi, Temperature up to 200°C
  • Suitable for Fluids and Gases
316L Stainless Steel Press Fit Pipe and Fittings
FAST INSTALL – REDUCED COSTS – REDUCED RISKS
Files for Download
Chibro Press Fit SS316L Piping (Tubing )
Technical Brochure/Catalogue
Download (2.23 MB) mei-chibro-press-fit-stainless-steel-brochure-and-catalogue-2014.pdf
Brief Overview (mostly images)
Brief Overview (mostly images)
Download (2.73 MB) general-presentation-meistainless-press-fit-piping-system.pdf
Pipe Size vs Working Pressure
Pipe Size vs Working Pressure
Download (1.04 MB) qf060-mei-ss316l-press-fit-pipe-sizes-and-operating-pressures-uncontrolled.xls
MEI Certificates and Approvals
MEI Certificates and Approvals
Download (527 KB) mei-approvals-and-certifications.doc
MEI 316L Stainless Steel Tube
All Press Fit tube is seam welded austenitic Cr-Ni-Mo Stainless steel AISI 316L according to standard U NI EN 10088.  All Press Fit tube is supplied in 6 metre lengths.  The Press Fit system requires a specialised tube which is not replaceable with other stainless steel tube.  Press Fit tube has a premium polish finished surface designed to withstand corrosion and demanding hygienic standards.  Press Fit tubes mechanical characteristics make it easy to work with, safe and durable in operation.  The key steps underaken during the manufacturing process of the Press Fit tube is a longitudinal electro-weld in neutral atmosphere, that is externally ground to a smooth finish.  All Press Fit tubes are tested with the eddy current system applying the procedures S.E.P. 1914 and S.E.P. 1925.  Dimensional tollerances of the Press Fit tube conform to EN 10312.

All Press Fit tubes are marked with the details of the producer, item number, material, dimension and batch in indelible ink along the entire length.
Operating Pressures for MEI Press Fit Piping System for various Pipe (Tube) Sizes
Outside Dia
Wall Thickness
mm
mm
15
1
18
1
22
1.2
28
1.2
35
1.5
42
1.5
54
1.5
76
2
89
2
108
2
Max Operating Pressure
psi
kPa
580
4,000
580
4,000
580
4,000
580
4,000
362
2,500
362
2,500
362
2,500
362
2,500
232
1,600
232
1,600
Fitting Slip Off Pressure
psi
kPa
3,480
24,000
3,480
24,000
1,958
13,500
1,958
13,500
1,450
10,000
1,450
10,000
1,450
10,000
957
6,600
957
6,600
957
6,600
Operating Temperature from -20°C up to 200°C
The above operating parameters will vary based on pipe size, temperature, cyclic pressure loading, type of fluid carried through the piping system and industry application. MEI recommends you confirm your application and parameters with us to ensure suitability.

Contact MEI on 02 9724 4511
Fittings
Fittings are made from austenitic Cr-Ni-Mo stainless steel 316L tube by means of cold forming.

Welding of fittings, where necessary during manufacturing, is completed by automatic welding machines operated by certified personnel.

Fittings are heat treated following shaping. This is followed by the insertion of the o-ring and a laser system is used to identify the item number, the manufacturer, the date of manufacture and the O.D. of the tube to be inserted. Each fitting has a toroidal groove with an “O” ring installed.
Pressing Tool
The tooling is a battery/electric product that is used in conjunction with a set of interchangeable jaws according to the diameter of pipe to be coupled.

When the tool is in operation the jaws generate an automatic controlled compression of the fitting and pipe to form a permanent watertight joint. The technical data of tools and their operating instructions are provided in the relevant catalogue on request.
How it works
Tube is cut to the length required, de-burred and the fitting of choice is simply slipped onto the tube until it reaches the stop. The fitting is then pressed onto tube via the use of the pressing tool with the correct “jaw” attached. This creates a water and gas tight seal in a few seconds.

The water tightness is produced by the compression of the “O” ring within the fitting with mechanical strength being achieved via the slight deformation of the fitting and tube. Please read manufacturer’s catalogue and brochure for more detail.
Thermal Expansion
Tubes and fittings are always subject to temperature variations which at times can be significant. This produces an expansion of the tube that is particularly evident on straight pipe lines. The expansion coefficient of AISI 316 L stainless steel in the range of temperature from -20°C up to +200°C is 16.5 x 10-6/K.
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Marine Equipment International Pty Ltd