MHT6115-2017 English PDFUS$329.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. MHT6115-2017: The excellent equipment technical requirement of internal aluminum floating roof for commercial aviation fuel tank Status: Valid
Basic dataStandard ID: MH/T 6115-2017 (MH/T6115-2017)Description (Translated English): The excellent equipment technical requirement of internal aluminum floating roof for commercial aviation fuel tank Sector / Industry: Civil Aviation Industry Standard (Recommended) Classification of Chinese Standard: V56 Classification of International Standard: 49.100 Word Count Estimation: 14,194 Date of Issue: 2017-12-16 Date of Implementation: 2018-03-01 Regulation (derived from): Civil Aviation Industry Standards Announcement No. 9 of 2017 Issuing agency(ies): Civil Aviation Administration of China Summary: This standard stipulates the technical requirements for the equipment of the aluminum floating roof of civil aviation fuel storage tanks. This standard applies to the use, inspection and maintenance of aluminum floating roofs for civil aviation fuel storage tanks. MHT6115-2017: The excellent equipment technical requirement of internal aluminum floating roof for commercial aviation fuel tank---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order. The excellent equipment technical requirement of internal aluminum floating roof for commercial aviation fuel tank ICS 49.100 V 56 MH Civil Aviation Industry Standard of the People's Republic of China Aluminum inner floating roof of civil aviation fuel storage tank Technical requirements for intact equipment 2017-12-16 released 2018-03-01 implementation Issued by Civil Aviation Administration of China ForewordThis standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard was proposed by the Aircraft Airworthiness Certification Department of the Civil Aviation Administration of China. This standard is under the jurisdiction of the China Academy of Civil Aviation Science and Technology. Drafting organization of this standard. China National Aviation Fuel Corporation. The main drafters of this standard. Tan Chuan, Gu Long, Huang Haipin, Du Le, Liu Chun, Li Qingming, Guan Yueyang. Technical requirements for intact aluminum inner floating roof equipment of civil aviation fuel storage tanks1 ScopeThis standard specifies the technical requirements for equipment integrity of the aluminum inner floating roof of civil aviation fuel storage tanks. This standard applies to the use, inspection and maintenance of the aluminum inner floating roof of civil aviation fuel storage tanks.2 Terms and definitionsThe following terms and definitions apply to this document. 2.1 Skeleton frame The aluminum profile is connected by bolts to form an inner floating roof frame. 2.2 Frame skin Aluminum sheet covering the inner floating roof frame. 2.3 Pontoon A closed cylindrical component that provides buoyancy for the inner floating roof. 2.4 Peripheral seal An elastic device for sealing between the inner floating roof frame edge and the inner wall of the storage tank. 2.5 Supports The supporting member when the inner floating roof is lowered to the bottom of the tank. 2.6 Automatic bleeder valve When the inner floating roof is in the supporting state to floating, it can open and close automatically. 2.7 Anti-rotation mechanism A device used to restrict the rotation of the inner floating roof. 2.8 Gauge hatch The components on the inner floating roof are used for oil measurement and sampling. 2.9 Manhole Installed on the surface of the inner floating roof for personnel to go up and down the floating roof. 2.10 Electrostatic conductive mechanism A device that collects static electricity on the inner floating roof is derived.3 Basic requirements3.1 The inner floating roof should be able to operate smoothly without obstruction during the full stroke, and should be in a horizontal floating state when lifting and stationary, with anti-rotation devices, The automatic vent valve and surrounding sealing device have no jamming phenomenon, and should not cause damage to the storage tank and accessories. The schematic diagram of each component of the inner floating roof is shown in Figure 1 Shown. 3.2 The inner floating roof should not fall to the bottom during normal use, and the maximum floating height should not exceed the safe height of the storage tank. 3.3 When the inner floating roof is in a supporting state, the flow rate of oil entering the tank should not be greater than 1 m/s, and the flow rate out of the tank should not be greater than the maximum ventilation valve Air volume. 3.4 After the inner floating roof is fully floated, its maximum lifting speed should meet the design requirements. 3.5 All metal parts on the inner floating roof should be electrically connected to each other. 3.6 There should be no oil on the upper part of the inner floating roof, otherwise it indicates that the inner floating roof is faulty. 3.7 The allowable deviation of the radius of the inner floating roof edge plate is ±10 mm. 3.8 The level deviation of the inner floating roof should not be greater than 10 mm (as shown in Figure 2). 3.9 The newly built and overhauled inner floating roof should be fully inspected within one year after it is put into use or when the cumulative operation reaches 60 times the full stroke (the first arrival is The inspection period should not exceed 5 years. The inspection can be carried out in conjunction with tank cleaning. The checklist can be found in Appendix A. Note. The stroke of the inner floating roof rising from the lowest liquid level to the highest liquid level and then falling back to the lowest liquid level is the full stroke.4 Components of the inner floating roof4.1 Skeleton 4.1.1 The bolts connecting the skeleton and the skin plate shall not be loose or missing. 4.1.2 All aluminum profiles should not have obvious deformation, cracking and damage. The straightness of the main and auxiliary beams should not be greater than 1‰ of their length and not greater than 1 mm. 4.2 Skin board 4.2.1 The skin panel should not be damaged, twisted or wrinkled. 4.2.2 The skin board and the bead should be tightly connected, and there should be no gaps. It can be inspected by strong light, and it is qualified if it is opaque. 4.2.3 The local corrosion depth of the skin plate should not exceed 1/2 of the thickness of the skin plate. 4.3 Float There should be no pits or perforations on the surface of the buoy, no distortion or wrinkles in the welding part of the buoy, and no oil infiltration inside the buoy, otherwise Should be replaced. 4.4 Peripheral sealing device 4.4.1 The peripheral sealing device should be closely attached to the inner surface of the tank wall, and its sealing length should not be less than 90% of the circumference of the storage tank. The maximum gap does not exceed 6 mm. 4.4.2 The sealing rubber belt should be free of damage or cracks. 4.4.3 The sealing rubber band and the edge plate of the inner floating roof should be connected tightly without loosening or peeling. 4.4.4 The sealing rubber belt should be wear-resistant and oil-resistant. 4.4.5 The service life of the sealing rubber belt should not exceed 6 years. 4.4.6 The structure of the peripheral sealing device is shown in Figure 3. 4.5 Support column 4.5.1 The support column and the internal floating roof frame should be firmly connected. 4.5.2 When the inner floating roof drops to the bottom, any support pillars should not be suspended. 4.5.3 The body of the support column should not be significantly bent, and its straightness should not be greater than 1 mm. 4.5.4 The verticality deviation between the support column and the inner floating roof should not be more than 3‰ of the support height (as shown in Figure 4). 4.5.5 The rubber gasket at the foot of the support column should be firmly attached and completely cover the bottom surface of the support column, the split pin should be complete, and the lower end of the drain should be unobstructed. 4.5.6 The support column should not be in contact with any accessories in the tank such as tank bottom pipelines and floating oil outlets. 4.6 Automatic ventilation valve 4.6.1 When the inner floating roof is in a supporting state, the opening height of the automatic vent valve should be 150 mm ~.200 mm (as shown in Figure 5). 4.6.2 The valve stem of the automatic vent valve should move smoothly. 4.6.3 The valve cover and valve housing of the automatic vent valve should be well sealed and should not be deformed or damaged. 4.6.4 The rubber gasket at the lower end of the valve stem of the automatic vent valve should be firmly attached and completely cover the bottom surface of the valve stem, the split pin should be complete, and the drainage should be unobstructed. 4.7 Anti-rotation device 4.7.1 The anti-rotation wire rope should be taut, and the horizontal swing should not exceed 50 mm. 4.7.2 The verticality deviation of the anti-rotation wire rope should not be more than 1‰ of its length, and should not be more than 10 mm. 4.7.3 The wear depth of the wire rope casing should not be greater than 1 mm, otherwise the casing should be replaced and the casing installation position adjusted. 4.7.4 The wire rope should be intact and there should be no broken wires. 4.7.5 The connection tie between the steel wire rope and the base should be locked tightly without looseness. 4.7.6 The welded joint between the base and the bottom of the storage tank should be intact, free of welding and cracks. The welding place should avoid any welding seam on the bottom of the tank. 4.7.7 Check whether the tension springs and tie rods are corroded. If the corrosion is serious, replace them in time. 4.7.8 The pull rod and pipe cap at the top of the wire rope should be detachable freely. 4.7.9 The schematic diagram of a single anti-rotation device is shown in Figure 6. 4.8 Electrostatic conductive device 4.8.1 The electrical connection between the static conductive stainless steel wire rope and the inner floating roof and tank top should be reliable. Special electrical connection made of stainless steel should be provided at the connection Both ends of the terminal are fixed with two stainless steel bolts no smaller than M10 plus anti-loosening washers and double nuts. 4.8.2 The static conductive stainless steel wire rope should not be twisted, knotted or broken. 4.8.3 The length allowance of the static conductive stainless steel wire rope should not be less than 1 000 mm. 4.9 Oil measuring hole 4.9.1 The deviation between the center of the inner floating roof oil measuring hole and the center of the tank top oil measuring hole should not be more than 5 mm. The dipstick put in from the Apparatus such as sampler, temperature measuring box, etc. should be able to pass through the inner floating roof oil measuring hole unobstructed. 4.9.2 The rubber skin of the opening of the oil measuring hole should be kept in a horizontal state without aging and sagging (as shown in Figure 7.Figure 7a) shows the state of the rubber skin Good, Figure 7b) shows that the rubber watch is aging and sagging). 4.10 Manhole 4.10.1 The opening and closing state of the manhole cover shall be intact. 4.10.2 The manhole climbing ladder should be welded firmly without looseness. 4.10.3 The sealing tape should be complete, and the closed state should be sealed. 4.10.4 The schematic diagram of the manhole is shown in Figure 8.5 Equipment files5.1 The user enterprise should have a complete internal floating roof design document. At least should include calculation sheet, internal floating roof general drawing, parts and materials and specifications Inch and so on. 5.2 The user enterprise shall record in detail the abnormal phenomena, inspection and maintenance conditions in the use of the inner floating roof.Appendix A(Informative appendix) Internal floating roof equipment inspection table See Table A.1 for the checklist of internal floating roof equipment. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of MHT6115-2017_English be delivered?Answer: Upon your order, we will start to translate MHT6115-2017_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of MHT6115-2017_English with my colleagues?Answer: Yes. 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