EQUIPMENT

EQUIPMENTPRIVATE

Rubber gloves

Safety goggles NLN-A 1927

A tool box with tools

Hose clamps

A cloth

Extension cable

pH-paper

Conductivity measuring apparatus

Pall filter MCY 1001 Y 200H (20 )

Transportable Cleaning Unit

7322 306 31830

12 mm reinforced PVC hose

16 mm reinforced PVC hose

19 mm reinforced PVC hose

MATERIALSAcetone, technical grade

1322 500 04601

Sodium carbonate, technical grade

1322 504 28701

35% H2O2, technical grade

1322 518 60601

Citric acid, technical grade

1322 500 80901

Deionized water

1322 505 41701

(heated to 30o C)

SAFETY PRECAUTIONSUse the safety goggles and gloves during the working with the sodium carbonate

solution, the peroxide/citric acid solution and during the diluting of the

35% H2O2

Do not inhale the acetone fumes.

Acetone is a flammable and explosive substance, so keep it away from sources

of ignition.

Tap water must be present in case of an emergency.

ENVIRONMENTAL ACTIONSThe hot sodium carbonate solution must be drained into the acid/alkaline sewer

or into a container to use it again.

INSTRUCTIONS

Testing methods and effect of materials on emmision

when used in the manufacturing of CTV tubes or

component parts.

URW-0-4-0/403

SAFETY INSTRUCTIONS

See safety manual, volume 1, section

BXV 11-0

ADVANCE \Y 708.0FOR INTERNAL USE ONLY

90-01-09 DEGREASING OF STAINLESS STEEL ----------- RV-3-6-56/471 ----------- PROCESS EQUIPMENT ----------- name: H. Geerts 90-01-09 3 - 001 010 A4 TV 5.0 (C) N.V. PHILIPS' GLOEILAMPENFABRIEKEN 1991 INTRODUCTIONThe equipment specification for stainless steel process equipment prescribes

that all parts must be pickled and passivated before mounting.

Cleaning of stainless steel process equipment is not only the removal of

grease and dirt but also leaching out of synthetic materials and rubbers.

Leaching is the removal of release agents and softeners from the surface of

synthetic materials and rubbers which are also parts of the equipment and

only can be removed in a chemical way.

Stainless steel parts of the equipment are passivated as a part of the

cleaning process to increase corrosion resistance.

PROCEDUREInspection and debuggingBefore the cleaning procedure is started the equipment must be thoroughly inspected for:

- faults, loose pipes, defective connectors.

- corrosion sensitive materials: aluminium, nylon, rubbers.

- forbidden materials: teflon and copper containing alloys which are in contact

with process liquids (see URW-0-4-0/403).

Then the system must be checked for leakages.

After that the functional aspects are checked such as the correct working of

pumps, valves and electrical systems. Debugging it is finding the reason why

the process equipment is not doing what it is supposed to do.

Finally, after filling with deionized water the system is pressurised for

1 hour at the maximum permissible pressure (e.g. 4 bars).

Preparation- Clean O-rings and seats with acetone and a cloth.

- Put the 20 filter into the filter housing.

- Use the Transportable Cleaning Unit (TCU, see 7322 306 31830)

- Connect pressure side of the TCU with the tank or inlet of the process

equipment.

- Connect the outlet of the process equipment with the inlet of the TCU.

- Connect all drains with hoses to the tank or to the tank of the TCU.

- Fill TCU and equipment system with deionized water and test functioning of

TCU and equipment.

Degreasing- When everything works correctly add sodium carbonate to 5% by weight. Take

care that the process equipment is completely filled.

- Put temperature of TCU to about 55(C and measure temperature in process

equipment. Adjust this temperature to 50(C with TCU.

- Circulate for 1.5 hours.

- In the meantime rotate all valves 20 times.

- When the equipment is very dirty a new batch of sodium carbonate has to

be used after draining of the first polluted one.

ADVANCE \Y 708.0FOR INTERNAL USE ONLY

90-01-09 DEGREASING OF STAINLESS STEEL ----------- RV-3-6-56/471 ----------- PROCESS EQUIPMENT ----------- name: H. Geerts 90-01-09 - 002 010 A4 TV 5.0 (C) N.V. PHILIPS' GLOEILAMPENFABRIEKEN 1991 Flushing- Disconnect hoses with TCU.

- Pump the hot sodium carbonate solution into the next process equipment

that has to be cleaned or store it in a container.

- Or drain the solution into the acid/alkaline sewer.

- Fill process equipment with warm deionized water.

- Circulate 5 minutes and drain.

- Fill two times more with warm deionized water and drain. Also activate

all valves 10 times.

Passivating/neutralizing- Fill tank of process equipment or the TCU, when the process equipment has no

tank, with 0.1 wt% H2O2 and 0.02 wt % citric acid. Take care process

equipment is completely filled.

- Circulate for 30 minutes and check pH = 3.

Add H2O2 and citric acid if pH is too high.

- Activate valves 10 times.

- Drain the process equipment liquid into the acid/alkalic sewer.

- Or pump it into the next equipment to be neutralized/passivated or into

a container.

Flushing- Fill the tanks or TCU with deionized water and circulate 5 minutes.

- Actuate valves 10 times.

- Drain.

- Flush till pH of water in tank is the same as from deionized water.

- Finally check if the resistivity of the water going to the drain has the

same value as the incoming deionized water.

Final actions- Remove all hoses and put everything in order.

- Fill system with deionized water.

- Remove the cleaning filter and install the process filters.

- When possible let the process equipment operate continuously.

REMARKWhen the process equipment has a level measuring system with a capacitance

electrode, the maximum level indication changes with the sodium carbonate

concentration.

ADVANCE \Y 708.0FOR INTERNAL USE ONLY

90-01-09 DEGREASING OF STAINLESS STEEL ----------- RV-3-6-56/471 ----------- PROCESS EQUIPMENT ----------- name: H. Geerts 90-01-09 - 003 010 A4 TV 5.0 (C) N.V. PHILIPS' GLOEILAMPENFABRIEKEN 1991