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Petroleum refining is characterized by the largest amount of systems exposed to corrosion compared to any other sector of the oil industry. Corrosion problems occur everywhere, from the points of raw materials delivery up to removal and transportation of the refined products. Corrosion control measures shall be taken at crude oil distillation plants and units for alkali treatment of oil, gas plants, reformer and cracking units, straight run deisobutanizers, units for adsorption of hydrogen sulphide from aqueous solutions, furfural treatment units etc. Liquid composition may vary depending on a particular stage of the oil refining cycle – from sulphurous, acid oil-water mixtures fed to refineries to final products (e.g., gasoline) with negligible water content. It is hardly possible to use any “universal” corrosion inhibitor due to the variety of process mechanisms that may cause intense corrosion of equipment used in the oil sector. The need to ensure property package determining processability and compatibility of the inhibitor with corrosion medium components necessitates development of an inhibitor that would be functional in different corrosive conditions. Oilfield water containing large amounts of chloride ions, oxygen, carbon dioxide and hydrogen causes and promotes further development of local electrochemical processes, which represent the most dangerous type of corrosion and failure of metal. Oilfield practice shows that the most dangerous local corrosion damages also occur in the presence of microorganisms. In order to protect oil equipment against chemical and bacterial corrosion, Karvan-L company designed efficient and cost-effective water-soluble and oil-soluble corrosion inhibitors. Corrosion inhibitors are nitrogen-containing surfactants, produced based on natural acids with addition of film-forming admixtures and biocides.
Crude oil flowing from wells contain fair amount (often 20-30%, sometimes up to 60-65%) of water with dissolved salts from basis point up to 1-2%. This significantly increases viscosity of crude oil, generates stable emulsion and makes the oil inadequate for refining and transportation. Water produced together with oil is usually in very unusual state, i.e. it is spread in oil in the form of droplets (emulsified form). Less the size of droplets, more stable the emulsion. One of the main reasons of emulsion stability is also the presence of resin, pyrobitumen, paraffin, and other oil admixtures like glycerine, microcrystal of paraffin, ceresin in crude oil. These substances generate quite firm and thick (protective films) on the surface of water and solid particles thus preventing merging of water drops and solid particles and their spontaneous segregation from oil. At present physical, thermal, physico-chemical, electrical and combined methods of oil emulsion breaking are used for oil dehydration and oil desalting. One of the widelyused and most effective methods is physicochemical combined method using chemical reagents demulsifiers. Demulsifiers are substances with high surface activity. They are concentrated in interfacial areas of oil emulsion, break protective films covering solid particles, water droplets and neutralise their electric charges. After this, small droplets will merge into bigger drops under the influence of mutual attraction, loosen and segregated from oil.Oil demulsifying is carried out in oil field and oil refinery plants. At present “KARVAN-L” company tries to provide integrated work cycle: – development production supply and implementation of produced demulsifiers together with consumer. Demulsifier Karvan-200 is designed for oil dehydration and desalting in gathering system and oil treatment plant. Reagent can also inhibit corrosion processes.Demulsifier Karvan-201 is designed for separation of both light and heavy crude emulsion. This reagent is the composition of macroglycols and nitrogen-bearing surfactants in organic solvent environment Demulsifier discharge per 1 ton crude is 10-60gr. Dosage depends on emulsion stability, treatment temperature, water separation period and desired depth of oil processing. Optimum dosage and demulsifier application process ensuring necessary results can only be defined as per test results carried out in practical use sites.
Toolroom having efficient precise equipment can fast and in workman-like manner to produce production tools: details pressurization from plastic and rubber, including additional remote fueling connecting, moulds for 2 colored founding. demention of pressing details 1000x1200mm, mould weight to 3000 kg, stableness 60-100 thousand snatching. For improvement details setting, appearance qualitative of shape mould elements executed from stainless steel with grade 40×13 thorough work surface polishing. Forms for founding under pressure of from aluminum alloy and zinc alloy. Maximal measurement casts 1000×1200 mm, forms weight to 3000 kg, stableness 50-80 thousand snatching. Different die tooling including die tooling for fine blanking details on moulds threefold actions, providing shear purity not lower RA 1,25 and dimensional accuracy up to 7 finish, which excludes ancillary details mechanical revision (grinding). Labor componentry are practically gapless (gap between labor parts is 0,005mm), executed from steel X 12M, maximal sizes of operating groove500x600mm, stamp stab-leness up to 300 thousand snatching. For stamp stableness decreasing it is possible variant labor componentry with hardmetal alloys usage. Instrumental equipped by highly productive equipment and unique machine CHPU Fanuc. For increase of durability of casting forms lowtemperature galvanization is applied. Plant has unique site of fine blanking on presses of triple action with force of slash form 50 up to 240 tn per sec. Enterprise has facility to get orders for manufacture of blanking, pressforms and forms for casting under agreed prices. Term of manufacture is from 1 up to 6 months depending on complexity of arming. The workshop realizes complete cycle of pressforms casting. Projection of arming is realized by appliance of engineering modeling programs. Development of technologic programs of mechanical processing Manufacture of details on boring, turning machine Milling, thermal treatment, profile, round, optic, coordinate polishing, erosion weaving, wire cuts Benchwork, polishing and mounting Besides pressforms the workshop manufactures stamps, appliances, spare parts to equipment and other items. Subsidiary services operate, also repair, service of the equipment, tool grinding. Personnel of technical department and of the workshop possesses great experience in projection and manufacture of pressforms. Documentation in technical department on arming passes agreement, and technical development. Technological programs of machine processing are established, tool of second tranquility is projected.
Aviation turbine jet fuel a1, aviation kerosene colonial grade 54 (jp54), en590, diesel d2 gost 305 82, espo crude oil, light cycle oil, petroleum coke, diesel fuel en590, fuel oil cst 180, 280 and 380, c4 raffinate, lng and lpg d6 virgin fuel oil, mazut m100, rebco, bitumen and urea contact on whatsapp: +7999718 17 69.
