Tank. • Transformer tank construction shall conform in all respect to clause 15 of IS 1180(Part-1):2014. • The internal clearance of tank shall be such, that it shall facilitate easy lifting of core with coils from the tank without dismantling LV bushings. • All joints of tank and fittings shall be oil tight and no bulging should occur during service. • Inside of tank shall be painted with varnish/hot oil resistant paint. • The top cover of the tank shall be slightly sloping to drain rain water. • The tank plate and the lifting lugs shall be of such strength that the complete transformer filled with oil may be lifted by means of lifting shackle/Hook Type. • Manufacturer should carry out all welding operations as per the relevant ASME standards andsubmit a copy of the welding procedure and welder performance qualification certificates to the customer.
Tank. The transformers tank shall be of robust construction and shall be built of electrically welded M.S. Plates. All joints of tank and fittings shall be oil tight and no bulging shall occur during service. The tank design shall be such that the core and windings can be lifted freely. The tank plate shall be of such strength that the complete transformer when filled with oil may be lifted easily by means of the lifting lugs provided. Tank inside shall be painted by varnish/hot oil paint. Top cover shall be slightly sloping (difference of heights should be 20 mm + 10%) towards H.V. bushing and cover the top with end walls. Shape of the tank shall be rectangular only. No other shape will be accepted. The tank shall be fabricated by welding at corners. No Horizontal or vertical joints in tank side and its bottom or top cover will be allowed.
Tank. Shall have a minimum capacity of 600 gallons. Maximum capacity shall not exceed 800 gallons. Shall be elliptical in cross section with tank shell constructed of no less than 12 gauge steel. Tank shall have surge plate(s) as regularly furnished by manufacturer with openings to allow free flow of material to pump. Shall have a manhole opening no less than 20” in diameter for access to the entire tank. Manhole opening shall have smooth ed ges and be equipped with a hinged cover. Tank design and construction shall meet all applicable federal cargo tank regulations, including rollover protection to meet HM-198A/HM-183 DOT hot asphalt requirements.
Tank. Circular cross section cooling tubes of not less than 38 mm dia and 1.25 mm thick bent & directly Welded to tank shall be provided. The transformer shall be capable of giving continuous rated output without exceeding the specified temperature rise .Bidder shall submit the calculation sheet.ORFor Corrugated tanks: Corrugations shall be built up with CRCA sheets of 1.6 mm thickness and Tanks with corrugations shall be tested for leakage test at a pressure of 0.3 kg/cm2 measured at the top of the tank.
Tank. Hot water storage tanks also need to be inspected. If a tank is leaking or otherwise beyond its useful life, should note that in the initial inspection report and make a determination as to whether it is appropriate to install recirculation controls before the aging tank is replaced. In addition to the overall condition and serviceability of the tank, the contractor should inspect for a number of specific conditions. • Pressure Temperature Relief ValveSome boilers and some storage tanks are factory equipped with pressure/temperature relief (PTR) valves. In most situations they are added by the equipment installer. Either way, they need to be checked to be sure they work before controls are installed. Checking a PTR valve involves lifting the lever and making sure that water comes out. If the tank does not have a PTR, installing one should be a standard part of a contractor’s control installation procedures. • InsulationModern storage tanks are usually manufactured with R-12 to R-16 insulation between the tank and the sheet metal skin. Older tanks can be wrapped with an insulation blanket. Contractors’ initial inspection should note whether the tank has insulation, either internal or external. • Aquastat to Boiler (if applicable)The Aquastat between the boiler and the storage tank (for applicable systems) should be checked. The contractor should inspect the connections, temperature setting, and whether it controls the boiler/tank pump correctly. • Galvanic Corrosion
Tank. Transformer tank is an enclosure which contains inside it the live parts such as core and winding assembly, electrical connections and insulating oil. Generally few transformer tanks falls exactly in any one of the categories described below. Most of the tanks have a combination of the features described in these categories.a. Conventional tankA tank in which the tank to cover junction is at the top of the tank.
Tank. Tank shall be gallon capacity £ non-code or £ code (ASME Section VIII) of nominal dimen- sions diameter x long with flat heads (non-code) or dished heads (code). Connections shall include anti-vortex pump suction, overflow, return, vent, drain and all necessary connections for sight gauge, makeup valve, and thermometer.