- During scraping the outer oxidized layer of pipe gets removed and the clean surface is available for Electrofusion jointing.
- Wipe pipe ends using clean, disposable, lint free material to remove traces of dirt mud, etc. Pipe ends may be washed with clean water if necessary and dried with the lint free material. Ensure pipe end is completely dry before proceeding.
- Mark the area +50 mm beyond the fusion area.
- For socket fitting measure the depth of penetration of the fitting by placing the socket of the bagged fitting alongside the pipe end and put a witness mark on the pipe at half the fitting length (i.e. Center Mark) to indicate the area to be scraped. Do not remove the fitting from its packaging at this stage.
- For Saddle fitting mark the area for scraping by putting saddle on pipe without removing the packing.
- Carefully scrape the whole circumference of the pipe in axial direction over length using a rotary / hand scraper
- When rotary scraper is used, no second scrapping must be performed.
- Wipe the scraped surface with an authorized Isopropanol impregnated pipe wipe or with isopropyl alcohol (IPA) & tissue paper for degreasing the scraped area or soiled fittings.
- Mentholated spirits, acetone, methyl ethyl ketone (MEK) solvents are not recommended for wiping the scraped surface. Ensure the prepared surfaces are completely dry before proceeding.
For Good practices
a) Always Mark the area to be scraped before scraping.
b) Use a mirror to inspect while scraping the underneath pipe surface.
c) While scraping remove the entire surface of the pipe over the area indicated, to a depth of approximately 0.3mm.
d) Pipe must be scraped so that shavings of uniform thickness are formed.
e) Remember to de-bur the pipe ends after scraping.
f) Do not touch the prepared pipe surface.
