Prepared by : Islam Nassef. Mechanical Engineering Head Dammam 31463 P.O Box 11742 KSA Mobile: +966 (54) 400 5975 Tel : +966 (13) 841 2135 Ext.109 Fax : +966 (13) 842 1756 islamnassef@gwc.com.sa www.gwc.com.sa

TECHNICAL PRESENTATION FOR MECHANICAL WORKS

1. Introduction

2. Overall execution overview

2.1 Civil works

2.1.1 Excavation.

2.1.2 De-watering (if any)

2.1.3 Backfilling

2.2 Pressure Test.

2.3 Redirect Flow.

2.4 Asbestos Pipes removal.

3. Safety Regulations

Uses of Asbestos

When is Asbestos Dangerous?

Asbestos-Related diseases.

What is the safest way to handle AC Pipe ?

How to Avoid Exposure ?

Pipe insulation

Water pipeline.

Surfacing insulating materials

Reinforcement of materials

Fireproofing

Acoustic and decorative plaster.

Ceiling and floor tiles.

Asbestos insulated pipe

Asbestos insulated boiler

Asbestos has been used for centuries, but greatly increased during and after World War II in ship insulation and the following:

Use has greatly declined since the late 1970’s

Cement-asbestos pipe

Cement-asbestos pipe was used underground and above ground in years past and may show up in pipe replacement jobs, building demolition jobs or excavations.

Asbestos shingles and siding

Found in older houses – not to be confused with newer asbestos-free cement siding. There is little hazard unless disturbed. The top right hand picture shows a siding replacement job with broken green asbestos shingles which would have released dust and fibers into the air if done incorrectly.

Removal done correctly

Asbestos-containing ceiling and floor tiles will not be labeled or marked. These tiles cannot be differentiated from other tile by visual means - they must be analyzed by a laboratory test.

Removal done correctly

Asbestos Ceiling Tile - used until about 1980

Tile close-up

Oklahoma State University EHS

The most common way for asbestos fibers to enter the body is through breathing.

In fact, asbestos containing material is not generally considered to be

harmful unless it is releasing dust or fibers into the air where they can be

inhaled or ingested.

Many of the fibers will become trapped in the mucous membranes of the

nose and throat where they can then be removed, but some may pass deep

into the lungs, or, if swallowed, into the digestive tract.

Once they are trapped in the body, the fibers can cause health problems.

Asbestos is most hazardous when it is friable. The term "friable" means that the asbestos is easily crumbled by hand, releasing fibers into the air. Sprayed on asbestos insulation is highly friable.

Tiny breathable asbestos fibers are deposited in the alveoli, the ending small air sacs in the lungs.

The body’s defense mechanisms cannot break down the fibers.

Asbestos fibers cause damage to the lungs.

The fibers may also travel to the pleura, the membrane lining the outside of the lungs.

Airborne asbestos fibers inhaled deep into the lung can cause damage.

Alveoli

Pleura

Joe Darabant, 1949, covered with chrysotile asbestos fibers. Worked for 30+ years at the Johns-Manville Plant in New Jersey, cutting asbestos shingles and making asbestos block and pipe-covering materials.

Joe, 1989. Forced to retire in 1974 at age 50 from poor health; he died from asbestosis in 1990 at age 66.

Photos © RAVANESI@2000

Asbestosis is a serious chronic, progressive disease that can eventually lead to disability or death in people exposed to high amounts of asbestos over a long period. Asbestos fibers cause the lung tissues to scar; when the scarring spreads, it becomes harder and harder to breathe. Symptoms include shortness of breath, a dry crackling sound in the lungs while inhaling, coughing, and chest pain. This condition is permanent and there is no effective treatment.

Lung Cancer Lung cancer causes the largest number of deaths from asbestos exposure. The risk greatly increases in workers who smoke.

esophagus

larynx

oral cavity

stomach

colon

kidney

Evidence suggests that ingesting asbestos can also cause cancers in the:

Fibers can enter the mouth and be swallowed. Poor hygiene, leaving food/drinks out in contaminated areas, and carelessness can result in the ingestion of asbestos.

The safest way to handle AC Pipe is to make sure the material stays in

a non-friable condition. Non-friable asbestos material has a solid matrix that holds the asbestos fibers in check and will not allow asbestos

fibers to release easily, unless mishandled, damaged, or in badly weathered condition.

Friable asbestos material will easily release fibers when crushed.

In most cases, AC Pipe is considered non-friable.

Non-friable material must be handled, transported, and disposed of in a way that prevents it from becoming friable and releasing asbestos fibers.

Bad Storage.

Friable: can be easily crumbled or crushed by hand, releasing fibers into the air

Very small fibers stay in the air for long periods

Damaged or deteriorated ACM increases friability

Physical disturbance of Asbestos-Containing Materials (ACM) can suspend fibers in the air.

Asbestos is most hazardous when it is “FRIABLE”.

Photo of friable asbestos

If you have reason to suspect that something is asbestos, either because it is labeled as such, or because it something that is likely to contain asbestos (water pipeline, for example). . .

DO NOT DISTURB IT

Drill Hammer Cut Saw Break Damage Move Disturb

Never…

...any asbestos-containing

materials or suspected

materials.

Disturb ACM when replacing light bulbs, etc.

Sand asbestos floor tiles or backing material

Pin or hang pictures, plants, or objects on walls or from ceilings covered with asbestos materials

DO NOT:

Dry dust or sweep surfaces, ceilings, walls, or floors

Wet mop floors

Use only a HEPA-filtered vacuum to clean up asbestos debris

DO: Dust with a damp cloth

2. Overall execution overview

2.1 civil works

2.1.1 EXCAVATION:

1. The area to be excavated will be checked according to the

coordinates and dimensions as given on the relevant reference

drawings.

2. Excavation and cut area will be kept free of loose materials upon

removal; the excavated soil shall be identified and stored

separately from other spoil material for future use as backfill or

dispose to the nominated areas.

3. Safe access shall be maintained at all times to the excavated area.

4. The sides of the excavation shall be vertical or sloped according to

the excavation depth.

2.1.1 BACKFILLING:

1. Prior to the commencement of backfilling, GEEMCO site engineer

shall ensure that all constructions activities are completed, and

that all QC records are signed off and acceptable.

2. Backfill material will be either the same stored material which

resulted from the excavation process or an imported material.

3. The backfill material shall be spread on layers with thickness

30cm. each.

4. 1st. layer of backfill shall be spread at level above the normal

ground water level with 10cm. Suitable compactor will be used for

compacting the successive layers.

5. Manual compaction shall be used for compacting the layers in

case of the compaction operation occurring in narrow spaces

without compaction tests.

6. Successive layers will be compacted at 95% of the max. Dry

density for trenches and backfill around foundations.

2.2 Pressure Test.

2.3 Redirect Flow.

2.4 Asbestos Pipes removal.

Cleaning Pipe surface to insert saddle.

Insure pipe circumference .

Plastic measure tape.

Install the saddle.

Connect pressure gauge with valve.

4

3

PROPOSED CONNECTION- A

1

2

2

5

FLOW

3

EXISTING CONNECTION

1

2

5

FLOW

FL

OW

FLOW

4

3

1

2

2

5

3

1

2

5

FLOW

EXISTING CONNECTIONPROPOSED CONNECTION- B

66

7

1

3

EXISTING CONNECTION

1

2

5

FLOW

B

SADDLE INSTALLATION

3

1

2

5

FLOW

C

3

EXISTING CONNECTION

1

2

5

FLOW

D

Pressure test.

4

3

PROPOSED CONNECTION- A

1

2

2

5

FLOWFLOW

FLOW

F

Thrust block

1. We will use hammer and chisel to remove couplings from

Asbestos Cement pipes for any sizes.

2. Asbestos coupling removal may be accomplished by gradually

splitting the coupling lengthwise using a chisel and hammer. After

splitting the top of the coupling, a lever or similar tool is used to

split the bottom of the coupling.

MATERIAL MUST KEEP WET AT ALL CUTTING OPERATION TIME.

Site Preparation

Hand Excavation

PPE

Cutting Pipes

Poly Ethylene Packing

Transport to Aynkom Warehouse

Disposal

The removed pipes transferred to the packing site which is big warehouse.

In the packing site we put the coved asbestos pipe in special wooden boxes as PME regulations, then it closed carefully and labelled as Asbestos waste to be transferred to approved landfill.

Along with each shipment we have to issue a manifest which is a documents shows : type of hazardous material , quantity and date of shipment

In the landfill the asbestos boxes treated as Saudi PME regulations and a certificate should be created to certify that the disposal of asbestos DONE correctly. A copy of manifest & certificate of disposal will be sent to records of: PME, landfill, Aynkom co., BACS

Questions ?

Thank you for your attention