John Mayes Engineers have been a family run business since their conception in 1959. A small company with a long serving work force, they have steadily grown into an important supplier for the Petro-chemical, process, energy and allied industries. They were one of the fore-runners to stock and manufacture fittings in chrome-moly materials such as F5, F9, F11 and F22. Continued diversity in both materials and products manufactured has ensured continuity with customers – new and old.

We supply products in many grades of steel, mostly to the American standards ASTM & ASME. 304-321-316-F51/S31803-F55/S32760-F44/S31254-Alloy 400-F5/P5-F9/P9-F11/P11-F22/P22-F91-LF2/A333Gr6-LF3/A333Gr6-A105/A106-CuNi 90/10-410-174PH-F52/F60/F65-Nitronic 60-Alloy 825-C276