B2-HV17-B Type B B B Actual ratios i gear un Bevel-helical speed reducers B2

Flender/Flender Gear Units/Bevel-helical speed reducers B2

n is taken up. In general, during unfav ourable weather conditions, blasting and painting shall be avoided as far as pr acticable. 5.1.5 The external surface of ... chimney to be painted be dry and clean. Any loose particle of stand, cement, aggregate etc. shall be remove by rubbing with soft wire brush if necessary, acid etching with 1-1% HCL solu tion about 1 minutes shall be carried out and surface must be thorought washed with water to remove acid & loose particles then dry completely before application of paint. 5.2 Procedure of Surface Preparation. 1 of 1 STANDARD TECHNICAL SPECIFICATION MECON LIMITED REGD. OFF: RANCHI 8 OIL & GAS SBU, DELHI DOCUMENT NO. Page 6 of 5 TITLE MEC//0/2/0 REVISION : 0 SHOP & FIELD PAINTING EDITION : 1 5.2.1 Blast Cleaning 5.2.1.1 Air Blast Cleaning The surface shall be blast cleaned using one of the abrasives: AL2 particles chilled casts iron or malleable iron and steel at pressure of 7 kg. Cm2 appropriate distance and angle depending on nozzle size maintaining constant velocity and pressure. Chilled cast iron, malleable iron and steel shall be in the form of shot or grit of size not greater than 0.0 maximum in case of steel and malleable iron and 0.0 maximum in case of chilled iron. Compressed air shall be free form moisture and oil. The blasting nozzles should be enturei style with tungsten carbide or boron carbide as the material for liners. ozzles orifice may vary from 3/1 to . On completion of blasting operation, the blasted surface shall be clean and free from any scale or rust and must show grey white metallic lusture. Primer or first coat of paint shall be applie within 4 hours of surface preparation. Blast cleaning shall bot be done outdoors in bad weather without adequate protection or when there is dew on the metal hich is to be cleaned, surface profile shall be uniform to provide good key the paint adhesion (..3to 5 ). If possible vacuum collector shall be installed for collect