From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Letter from Gabriel Manufacturing Co. describing the manufacturing and testing process of Titeflex Petrol Pipes.
| Identifier | ExFiles\Box 85\4\ scan0066 | |
| Date | 24th September 1934 | |
| GABRIEL MANUFACTURING Co. (H.C.MINTER) Telephone EDGWARE 1369 COLUMBIA AVENUE, EDGWARE,(MIDDX) Telegrams "SNUBBERIZE, EDGWARE" MANUFACTURERS OF FLEXIBLE METALLIC HOSE THE SOCIETY OF MOTOR MANUFACTURERS & TRADERS LTD (Logo) Sept. 24th. 1934. Handwritten note top right: x 208? Handwritten note left: Hs{Lord Ernest Hives - Chair}/Bwg{J. C. Bowring} Noted 'E' Messrs. Rolls-Royce Ltd. Derby. Dear Sirs, Exptl Dept. Hs{Lord Ernest Hives - Chair}/Bwg.{J. C. Bowring} 16/KW. We herewith acknowledge receipt of your letter of the 21st. inst. regarding the samples of Titeflex Petrol Pipes you are testing. We enclose a booklet, which in a general way, describes how Titeflex is manufactured. We are afraid it would be hopeless to try and describe to you in a letter how we make the brass core proof against leakage, for so many factors enter, starting from the composition of the brass, the way it is rolled, slit, annealed and the sequence of these operations, and then on to the dozens of adjustments to the patented machine and dies that produce it - or automatically reject material that is not dead to size, correct in tensile strength, ductility etc. When the core comes off the machine it is run into a long tank of water and whilst immersed is subjected to an internal air pressure of 100 lbs per sq.in., which test it has to pass before being braided. Wherever possible we attach end unions ourselves for this provides us with the opportunity of re-testing a "complete pipe assembly" and so detecting possible joint leaks. As a matter of interest would say that we are regularly supplying Titeflex similar to the samples sent to you, for use on tipping lorry bodies where the oil pressure they convey runs from 1500 to 2000 lbs per sq. in. In other words the manufacture of Titeflex is a Titeflex ALL METAL FLEXIBLE HOSE | ||