WJA Surface Preparation Module (SP)
Candidates will learn the safe operation of jetting equipment for surface preparation application
Key features of WJA Surface Preparation Module
One Half Day Contact Time
Classroom and Practical Elements
Receive an Operational Jetting Card
Benefits of WJA Training
Candidates will gain a greater understanding of the dangers and safety requirements of high pressure water jetting.
Candidates will gain hands on time with the kind of jetting equipment commonly used in surface preparation and cleaning applications as well as carry out some cleaning opertations.
Candidates will gain a deeper understanding of the jetting principles increasing their ability to carry out surface preparation and cleaning tasks.
Candidates who successfully complete the course gain a City and Guilds approved certificate and photo card showing their credentials.
WJA SURFACE PREPARTION & CLEANING COURSE CONTENT
Registration & Introduction
Nozzles & jets – pumps &ancillaries- pressure controls- water jetting hose – hazards & injuries – PE – operational procedures.
Scope of surface cleaning & preparation applications. Range of tasks and differentiation between surface cleaning & surface preparation. Range of jetting machines suitable for surface cleaning / preparation.
Review nozzle principles – fixed jet nozzles, rotating nozzles, life & wear characteristics, associated ancillary equipment including automatic, semi automatic & wet abrasive blasting.
Hose used in surface cleaning & preparation applications, damage & wear possibilities, hose ancillaries. Review bore size & flow ratings.
Range of jetting machines used – engine controls & instruments. Pump pressure controls, review dump/dry shut & selector/fail safe types, auto engine speed control systems, pressure safety relief.
Water supply/delivery features – filtration requirements, boost feed pumps, built-in anti freeze provisions.
Information & assessment – site location, access to work area, surface to be cleaned & layout; base material & contaminants – initial condition and required finished condition; water provision, waste disposal, hazards. Selection of equipment & manning levels – jetting machine/nozzles/accessories, number & duties of operators, single person operation. Determine job method, based on safe system of work.
Daily checks – manufacturers’ instructions, other items requiring regular checks.
Setting up – permits/authorisations, barriers & warning signs, positioning of machine & equipment, team duties & signals, flushing, leaks check, trial run. Monitoring fo operation – flying debris, waste containment, work standard.
Job completion – client inspection, waste removal, equipment decontamination, return site to safe condition.
Jetting machine & equipment – review features and demonstrate daily checks, start / run/ stop.
Job assessment – review & discuss – site location & constraints, accessibility, screening/extraction requirements.
Work surface – nature of contamination, work to be carried out & standard of finish. Water supply, effluent drainage. Hazards & use of PPE. Discussion of options, agree job method.
Site preparation- setting up work area. Team talk- review job method, signals, set up teams). Positioning of jetting machine, layout & check equipment.
Demonstrate all procedures to full group. For all teams, instruct each operator in each duty.
Trainees carry out exercise – each team following instructions to set up, flush, check for leaks, carry out
trial run, proceed with operation. Rotate team members through duties. Review at each rotation and final review.
Disconnect equipment & clear site.
Review of course content as above, with opportunity for further discussion prior to Questionnaire.