8. galvanizing english

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File Name: Tower Strengthening SoW-Bab VIII Galvanizing

Date: 30/06/2009 of 7

Galvanizing




Date: 30/06/2009 of 7

Chapter VIII Galvanizing

A. Tools:

1. Drilling machine

2. Drilling machine edge for steel3. Paintbrush4. Steel-wire brush5. Sprayer6. Compressor machine

B. Material:

1. Cold Galvanize material

C. PPE:

1. Safety Goggles2. Safety Mask

3. Safety Gloves4. Safety Harness5. Proper Shoes

D. Method:

1. On site galvanizing are applied on tower material whereas it did cutting on siteand it high potentially corroded during implementation of strengthening.

2. Galvanizing method which applied on this condition is cold galvanize process

Picture 1. A sample cold galvanize material3. In this stage, the cold galvanizing process are applied on:

a. Cold galvanizing on part of tower where already cut on site such as: OBLclamp and lightning arrester clamp (if applicable)

b. Cold galvanize on outer part of welding point which applied on weldedarea after welding process and area where it hot dip galvanize aredamaged during welded




Date: 30/06/2009 of 7

c. Cold galvanize on existing tower where the area are damaged duringwelding process

4. First step need to do are Cleaning process the area from any dirt, dust, water.5. On the cutting area: (1) immediately spray the area with galvanize material. Do

spraying with recommended distance 20-30 cm from the area, otherwise appliedwith paint brush

6. On outer side of welding (2) use stell-wire brush to clean welding point from anydust. This step purpose is removing any dirt during welding and removing peel ofpaint at existing tower. After it finish, immediately continue with galvanized thearea either use spraying method (recommended distance 20-30 cm from thearea) or applied with paint brush

Picture 2. Spraying process with cold galvanize material

7. Before do spraying, shake the can of cold galvanize properly8. During spraying process, ensure it applied apportionment so any hole created

bedding with cold gavanize. When it covered already then it will eliminatecorroded.




Date: 30/06/2009 of 7

Picture 3. Corrosion due to improper welding process and galvanize process




Date: 30/06/2009 of 7

9. Refer to item no 3, hole already created on existing tower at position of weldingapplied (180°). Hole position is 10 cm higher then top area of welding

Picture 4. Hole for cold galvanizing process at inside part of existing tower




Date: 30/06/2009 of 7

10. Insert conduit spreyer inside of hole. The length of conduit enter into hole +/- 40cm

Picture 5. Sprayer

11. During spraying process, starting from down side (+/- 5 cm at bottom layer)continue slowly to upper side constantly without any break until the area finish.

E. PPE Concern:

1. Here are the doc of HSE need to be prepared:a. Tool Box Safety Meeting Record Sheet (as daily doc)b. Tower Personnel Examination Sheet (as daily doc)c. Tower Job Distribution and PPE Sheet

2. Ensure tools (drilling machine and air pump machine) on good condition.Especially for drilling machine, ensure it tighten on tower so it will eliminatepotentially fall down which will injure people stay in ground area.

3. Ensure only expert team who do welding (recommended certified welder)4. An equal condition with welding process, below comfortable circumstance also

applied on:




Date: 30/06/2009 of 7

a. Drilling process at high elevation (at erected tower) : only expert manpower shall do this process with always put carefulness in higher positionand supported by proper PPE such as: goggles, gloves, harness, andproper shoes.

b. Spraying process at high elevation (at erected tower) : recommendedspraying distance is 20-30 cm in order to avoid any risk worker to sniff

galvanize and supported by proper PPE such as : masker, gloves,harness, and proper shoes.

5. Any worker who claim tower is MANDATORY to wear harness in any cases

8. galvanizing english

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