WJA Pressure Washing Course
The NEW 1 Day 'Stand alone' Pressure Washing Course is designed for those who are involved with the smaller, lower power machines who felt that the current courses were a bit too involved for their application. Maybe for vehicle washing or small plant cleaning or just general clean-up jobs. The machines can be electric, diesel, petrol or PTO driven.
Your machine can be of any make, as long as it does not exceed 3000psi @ 5gpm then this is the course for you. This NEW course sits outside the scope of the current courses and does not require a Safety Awareness Certificate before attending this course.
The Certificate & Photocard are valid for 3 years and are issued by the Water Jetting Association (WJA), are recognised by the HSE and carry City & Guilds Accreditation (C & G).
Above are the NEW Pressure Washing Certificate and Photocard, issued by the Water Jetting Association, that are awarded to successful candidates passing the practical test and completing the questionnaire. The certificate and photocard remain valid for 3 years, on or before expiry the course must be retaken.
The morning of the course consists of issuing each trainee with the latest WJA Code of Practice for them to use during and take away at the end of the course, followed by the theory which covers Safety, Injuries, Legislation, PPE etc with the afternoon for the practical session. There will be a question paper towards the end of the day with 20 questions requiring a minimum 75% correct answers to successfully complete the course.
Certificates & Photocards are issued to those trainees who reach the required standards and need renewing every 3 years.
- Registration & Introduction
- Applications & Machines:
Effect of varying pressure/flow at the nozzle - range of jetting machines - configurations & categories (pressure washers)
- Legislation & The Wja Codes of Practice:
Health & Safety at Work Act - WJA Codes of Practice - status, use and recognition by the HSE Management Regulations - Risk Assessment - PPE at Work Regulations - COSHH - Employer/Emplyee responsibilities - Enforcement Powers - other relevant legislation e.g. Environmental Protection Act / control of Pollution Act. Confined Spaces entry Requirements.
Jet principles - purpose of nozzles - power of water jet - jet pressure/flow characteristic - jet reaction force. Types of nozzle - forward facing, fixed & spinning jets, multi-jet fixed & spinning nozzles.
Pump configuration - standard piston/plunger pump, positive displacement action, operating features, effects of blockages, variation of plunger sizes. Other pump configurations - diaphragm and intensifier types. Drive arrangements - engine/electric motor, hazardous area equipment. Water supply/delivery features - filtration equipment, boost feed pumps, pulsation dampers, jump-jet. Pressure safety relief options - relief valve/bursting disc. Pressure gauge features.
- Pressure Controls:
Dump & dry shut controls - fail-safe/selector versions, direct manual operation/remote operation via electric-pneumatic-hydraulic controls, automatic unloader valve for dry shut, pressure regulators and automatic off-load engine speed control systems.
- Water Jetting Hose:
Hose construction & pressure ratings, external & internal damage possibilities, hazards arising from damaged hoses, inspection requirements. Hose end fittings, construction/assembly/testing. Connectors & hose end couplings - types & features. Bore size & flow ratings. Hose for general/high flow/small bore tube & pipe cleaning. Pressure drop due to flow through hose & lances - effect on pressure available at the nozzle.
Hazards arising directly from the water jet - from operational regime - from site environment.
Effects of impact by high pressure water jet - nature of internal injuries caused - action in event of a jetting injury - awareness of possible absence of visual injury & use of WJA Medical Card.
- Personal Protective Equipment:
General principles regarding use of PPE, as a last resort; Main body protection - limits on effectiveness against direct impact of water jet. Protection of head, hands, feet, hearing, respiration.
- Operational Procedures:
Routine care & inspection - site preparations - preparations for operation - team operation. Safety ponts during operations - use of manual jetting gun, tube/pipe/drain cleaning nozzle/hose combinations & techniques. Safe use of non-standard equipment e.g. tee nozzle. Site shutdown & anti freeze procedures. Use of DO/DO NOT GUIDE.
Review of course content as above - with opportunity for any further discussion before Questionnaire.