Non-metallic seal

Norwegian standard NORSOK M-710 Rev. 2, Qualification of non-metallic sealing materials and manufacturers, October 2001. 

Cassar, M., G. V. Robins, R. A. Fletton, and A. Alstin (1983), Organic components in historical non-metallic seals investigated using C-13-NMR spectroscopy, Nature 303, 238-239. 

Robins, D., A. Alstin, and D. Fletton (1987), The examination of organic components in historical non-metallic seals with C-13 Fourier transform nuclear magnetic resonance spectroscopy, in Grimstad, K. (ed.), 8th Triennial Mtg., Int. Council of Museums Committee for Conservation, Sidney, pp. 82-87. 

Worksheet for the Selection of Oilfield Non-metallic Seal Systems... 

Experiments studying the corrosion behaviour of pipes and pipe connections made of the steel 1.4301 (SAE 304 UNS S30400) were carried out in cold drinking water in field tests lasting five years [34]. Table 20 contains data for pipes in various heat treatment states. The pipe connections were made of the same material as the pipes. Pressed fittings with a non-metallic seal and solder fittings were tested. The chemical composition of the solders used is shown in Table 21. 

The suitability of the non-metallic seals for pressure containment at the requisite operating temperature should be confirmed prior to procurement. 

This type of pump is used to handle abrasive, chemically corrosive, and oxidizing liquids, where conventional pumps would require exotic alloys. The wet end of these pumps is non-metallic or lined and coated, sealing and isolating any metal component. The power end is normal. 

There are also many non-API joints, like Hydril CTS, Hydril Super FJ-P, Armco SEAL-LOCK, Mannesmann metal-to-metal seal casing and others. 

Other elements which occur in organic compounds, such as phosphorus, arsenic, other non-metals, and metals in organic combination, are detected by destroying the organic material by oxidation (with nitric acid in a sealed tube or by fusion with potassium nitrate or sodium peroxide) and then applying the usual tests. 

To date, however, only few reactions between phosphine and a non-metal halide, in which a chemical bond is formed between phosphorus and a non-metal by HCl condensation, are known. To these, apart from the above-mentioned reactions, belongs also the reaction with CF3SCI which, depending upon the chosen proportions of the reactants, in a sealed tube at -95 °C leads to the formation of (CF3S)2PH or (CF3S)3P Both compounds are not very stable thermally and decompose at 40-50 °C. Tris(trifluoromethylthio)-phosphine forms an unstable adduct with chlorine, which decomposes at 0 °C to give a mixture of PCI3, bis(trifluoromethyl)-disulphide and trifluoromethyl-sulphenyl chloride. 

Samples sealed into ampoules exploded when stored in daylight, but not in the dark. See Other IRRADIATION DECOMPOSITION INCIDENTS See related NON-METAL HYDRIDES... 

Materials Compatibility Einally, any lubricant is required to be compatible with non-metallic components used in the engine, such as plastics, resins and elastomers. In particular, polymeric materials used in seals and plastics need to retain their integrity when in contact with the lubricant. ACEA and most OEMs have material compatibility tests to ensure that the lubricant will not cause undue degradation in key physical parameters of the polymer. These parameters include tensile strength, hardness, volume and crack formation. Any such loss of polymer integrity could be manifest as oil seal leaks or in more extreme cases as a blown gasket. Current engine test examples for American, European and selected OEM specifications are shown in Table 9.5. 

Non-metals are used for corrosion and wear resistance in piping, tanks, valve seats, gaskets, seals, etc. They are generally procured by trade names, although generic specifications exist for commodities such as PVC or plastic-lined pipe. Non-metals include plastics, rubbers, and cemented carbides. 

Non-metallic substances were introduced into the silver vessel shown in Fig. 6 this has the platinum winding on a silver tube soldered inside it, which also facilitates equalization of the heat. The winding was done as described above insulation was secured either by means of shellac or varnish and tissue paper. The platinum wire has one end soldered to the silver vessel the other end passes insulated through a little platinum tube soldered on to the silver the end of the tube is sealed airtight with glass enamel. 

These compounds are prepared by synthesis from the elements. The rare earth metal powder, as pure as possible, is placed in one of the arms of an L-shaped glass tube. The other arm contains the stoichiometric quantity of S, Se or Te (1 1 ratio). The tube is melt-sealed in vacuum and heated in an electric furnace until the non-metal is completely consumed. The temperature should reach 400-450 °C by the end of 2-3 days. Powder pattern analysis of the products indicates the formation of nonhomogeneous materials containing LngXa and LngX, but not LnX, which starts to form at1000-1100°C. 

Uses Non-chrome seal rinse for use in final rinse stage of metal deaning and phosphatizing operation seals conventional Iron phosphate coatings by forming additional layer ot coating containing zinc Features Does not contain chromates... 

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