B3CV-4-C acc to orderrelated documentation Without oil f Bevel-helical gearboxes B3

Flender/Flender Gear Units/Bevel-helical gearboxes B3

PARATION, SHOP COAT, COATING APPLICATION & REPAIR AND DOCUMENTATION 5.1 General 1 of 1 STANDARD TECHNICAL SPECIFICATION MECON LIMITED REGD. OFF: RANCHI 8 OIL & GAS SBU, DELHI DOCUMENT NO. Page 5 of 5 TITLE MEC//0/2/0 REVISION : 0 SHOP & FIELD PAINTING EDITION : 1 5.1.1 In order to achieve the maximum durability, one or more of following methods of surface preparation shall be followed, depending on condition of steel surface and as instructed by Engineer-in-Charge. Adhesion of the paint film to surface depends largely on the degree of cleanliness of the metal surface. Proper surface preparation contributes more to the success of the paint protective system: . Manual or hand tools cleaning. . Mechanical or power tool cleaning. . Blast cleaning. 5.1.2 Mill scale, rust, rust scale and foreign matter shall be removed fully to ensure that clean and dry surface is obtained. The minimum acceptable standard in case of manual or hand tool cleaning shall be St. 2 or equivalent, in case of mechanical or power tool cleaning it shall be St. 3 or equivalent, in case of blast cleaning it shall be Sa 2 or equivalent as per Swedish Standar SIS-0- 1/ ISO-8-1-1. Where highly corrosive condition exits, then blast cleaning shall be Sa3 as per Swedish Standard. Remove all other contaminants, oil, grease etc. by use of an aromatic solvent prior to surface cleaning. 5.1.3 Blast cleaning shall not be performed where dust can contaminate surfaces undergoing such cleaning or during humid weather conditions having humidity exceeding 8%. 5.1.4 Irrespective of the method of surface preparation, the first coat of primer must be applied on dry surface. This should be done immediately and in any case within 4 hours of cleaning of surface. However, at times of unfavourab le weather conditions, the Engineer-in-Charge shall have the liberty to co ntrol the time period, at his sole discretion and / or to insist on recleaning , as may be required, before primer applicatio