learning objective main tasks / process resources /...
TRANSCRIPT
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Timing (minutes)
Learning Objective Main tasks / Process Resources / tools
5 Title Standard Operating Procedures for Power Press Machine Slide 15 Index Contents of the presentation Slide 2
15 Introduction
The main purpose of guideline
Limitation
How to use the guideline
Slide 3, 4and 5
10 Slide 6-15
10 Slide 16 - 25
BREAK (30 MIN)45 Slide 26 - 3510 Slide 36 - 4910 Slide 50 - 48
BREAK (LUNCH)20 Slide 49 +
Video duration (15 min)10 Slide 5015 Slide 5130 Slide 52
BREAK (30 MIN)120
Total Time
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State 2 classifications of pressure vessels
State the definitions of steam boiler andunfired pressure vessel
State 4 applications of pressure vessels
State 5 hazardous conditions in the use ofpressure vessels
Explain the preventive and control measuresas per statutory requirements
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Definition Classifications and uses Hazardous conditions Factors that cause hazards and accidents Preventive and control measures Statutory requirements Conclusion
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Fired pressure vessel
Vessel that receives heat from external fuelsources and generates energy for specific uses.
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Any closed vessel Above atmospheric pressure Generates heat from certain external sources Produces steam (under pressure) Energy heats the medium [liquid fuel] in the
installation systemFor (boilers) steam, this includes economiser, super heater and other equipments that may be attached.
Example: thermal oil heater, autoclave
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Unfired pressure vessel
Vessel that requires no heat from external heat sources to operate.
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Any closed vessel Contains gas (oxygen), gas mixture (propane
and ethane), steam (from boiler), liquid (water or chemical) or solid (cement, sugar, fertilizer or flour)
May be below or above atmospheric pressure Example: air compacter, water softener
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Item Uses/Application Steam boilers
Generate steam Food processing Medical processes Manufacturing processes Utilities (Generate electricity)
Air compactorStorage of compact air, gas, liquid
Manufacturing processes Water treatment plant Food processing
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1. Mechanical blasts
2. Leakage in wall or tube
3. Toxic releases into the air
4. Cracks in wall or tube
5. Structural changes
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Excess pressure in vessel Faulty design Thinning of wall due to erosion Failure of automatic system Excess heat - overheating for steam boilers Failure of safety valve device
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Safety equipment/device STEAM BOILER
UNFIRED PRESSURE
VESSEL
SAFETY DEVICES FOR PRESSURE VESSELS
Water indicator Safety Release Valve
Pressure indicator Detector and alarm for high or low
water levels Blow down valves Feed check valve
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Design should follow specifications incode of practice
Vessel should be equipped with safety devicessuch as safety valve
Regular maintenance for vessel andits accessories
Scheduled inspection of pressure vessel
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Controls on maintenance and repair works
Provide training for operators
Select suitable pressure vessel accordingto process requirements
Appoint competent operator responsible for handling steam boiler
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1) Approval of design
2) Approval for construction
3) Hydrostatic / Steam tests
4) Important requirements
5) Person in charge (boiler)
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6) Certificate of Fitness
7) Scheduled inspection
8 ) Installation method
9 ) Pressure allocation for operations system
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1 0 ) Maintenance requirements
1 1 ) Notification of hazardous incident
12) Approval for restoration and modification
13) Control of welder, contractor
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Ensure that approval of design has been received from DOSH Malaysia
Schedule for Hydrostatic and Steam testsfor steam boiler with DOSH(Attach JKJ 105/106 and JKJ 127)
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Apply for permission to install and register withDOSH
• (attach JKJ 105/106 and JKJ 127)
Obtain the Certificate of Fitness (CF) for the registration
The vessel may only be used after CF has been obtained
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Pressure vessels may be classified into two: fired pressure vessels and unfired pressure vessels
Pressure vessel operations have the potential to cause hazardous situations and incidences
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There are statutory provisions in the FMA 1967and OSHA 1994 regulating the use of pressurevessels
The user/owner of the pressure vessel is responsible to ensure the safety of the vessel using various methods discussed in the lesson
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In an incident that occurred on 2nd December 2001 at approximately 10.30pm, an air compactorregistration number PMT 1245 broke and causedleakage at the bottom part of the wall. The unfired pressure vessel is the vertical type and has been placed outside the building since its installation 6 years ago. The employer intends to repair the leak by welding another piece of metal above it. Your observation of the vessel has revealed that the pressure indicator needle is not functioning and the release valve has signs of
corrosion.
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1) List 3 (three) factors that caused thefailure.
2) Recommend 4 (four) prevention and control methods that may be taken by the employer to avoid a recurrence of the incident.
3) State whether the repair works intended by the employer can be done successfully. What is your advice as the Safety and Health Officer to the employer?