High quality exotic piping products from approved manufacturers - We are the market leaders

Filter by Category

Special Piping Materials Update NDT Facilities

Dye Pen Tanks installed by Johnson & Allen

In late 2014, Special Piping Materials contracted MPI and DPI manufacturers Johnson & Allen for assistance in adding new Non Destructive Testing (NDT) facilities in their  inspection department. The investment into their facilities, which are now complete, will enable Special Piping Materials (SPM)to carry out their Dye-Penetrant testing more efficiently.

What is DPI?

Dye penetrant inspection (DPI), also called liquid penetrant inspection (LPI) or penetrant testing(PT), is a widely applied and low-cost inspection method used to locate surface-breaking defects in all non-porous materials (metals, plastics, or ceramics). DPI works on the principle of capillary action and is one of the most efficient ways to test non-porous parts for surface breaking defects so the method is ideal for inspecting pipes and fittings.

The implementation…

“With non-destructive testing now being a critical part of engineering, Special Piping Materials wanted a way to emphasise their commitment to manufacturing only quality goods and to ensure their high product standards were maintained into the future. Johnson & Allen was there to help them achieve this and was contracted to design and manufacture a suitable DPI solution,” said Johnson & Allen Sales Manager Tim Rotherham of their work on the project with SPM

SPM, established in 1989, ensures that all stock held undergoes rigorous testing in accordance with respective ASTM ASME standards and international specifications such as Norsok MDS, Shell MESC and ES-247. For all further testing requirements SPM use NAMAS/UKAS approved test houses on a subcontract basis. In addition to their now enhanced ability to carry out Dye-Penetrant testing, SPM carries out the following Destructive Testing: Product Analysis, G48 Corrosion Test, Micrographic Examination, Ferrite and Phase count, Charpy Impact Test, Tensile Test; as well as the following Non Destructive Testing: Ultrasonic Testing; Hardness Check ( In house ), Ferrite check ( In House ) and PMI ( In house )

Of the NDT upgrade, Rotheram goes on to say: “SPM required a heavy duty penetrant application tank and wash station though, not only due to the large number of parts that they were wanting to inspect, but also due to the heavy loads the stations would have to support. Taking these requirements on board the stainless steel system was built and installed late 2014 and will guarantee Special Piping Materials more reliable inspection, in shorter times, for increased part volumes far into the future.”

Fast, efficient delivery to your exact specification. Special Piping Materials is as committed to your project as you are.

Speak to one of our seven worldwide
offices today


Special Piping Materials Ltd Broadway, Globe Industrial Estate, Dukinfield, Cheshire, SK16 4UU, United Kingdom


Special Piping Materials (Scotland) Ltd Moss Road, Gateway Business Park, Aberdeen, AB12 3GQ


Special Piping Materials INC 4615, Kennedy Commerce Drive, Houston, Texas-77032


Special Piping Materials Do Brasil Ltda. Warehouse Stock & Office Estrada do Mato Alto, 912 Campo Grande – RJ – CEP 23036-150


Special Piping Materials (Singapore) Pvt Ltd 43, Kian Teck Drive, Singapore-628856


Special Piping Materials Fze P.O.Box: 120667, Sharjah Airport Free Zone, Sharjah – UAE


Special Piping Materials Authorised representative for Oman Petrovision International LLC, PB NO: 1497, Postal Code 133, Al Khuwair, Oman.


Special Piping Materials Australia Pty Ltd 11 Purser Loop Bassendean Western Australia 6054