Sucessful Cleanroom Selecting your Cleanroom Company

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Sucessful Cleanroom • • • • • •

By Neil Thomas Beng, CTCB D & B Cleanrooms, Design & Manufacture of Clean Air products Validation & Service Longest Established UK Company In 50 years years we have witnessed, made or rectified most of the common mistakes.

Selecting your Cleanroom Company • Be early • Do not waste your expense with more than 4 tenders • With many tenders some prices will be flyers • Experience, knowlegde & inovation • References for last 3 projects within 18 months • Beware of the yes men • Multi product company will tend to give an unbiased view • In house capability

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And Health & Safety

With Adequate Supervision

Seriously Obtain Record Data From The H&S Executive

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Clean Room Types CLASS 'D' OR 'E' / ISO 14464/1 CLASS 4 & CLASS 5 Vertical unidirectional laminar flow with raised floor.

CLASS 'F' VERTICAL / ISO 14464/1 CLASS 5 Unidirectional laminar flow wide side exit.

CLASS 'F' HORIZONTAL / ISO 14464/1 CLASS 5 Conventional flow.

CLASS 'H' OR 'J' OR 'K' / ISO 14464/1 CLASS 6, CLASS 7 or CLASS 8 Laminar flow side exit.

ISO Class 3 Unidirectional

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Clean Air Rigs

The range of clean air rigs can be mobile as shown or fixed, either from the ceiling or floor

ISO Class 3-7

Laminar Flow Cabinets

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ISO Class 7 In Unclassified Area Temp o 21 C +/- 0.21 oC RH 35% +/- 3%

Grade C In Grade D Area

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Grade C In Grade D Area

Grade A, B &C Areas In The Carpark

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Grade A-B

Ability to Reduce Cost • • • • • •

Longer tender periods Concise Brief Accurate Room Loading Environmental Control Parameters Ambient Conditions Beware of the yes men

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COST

Ability To Reduce Project Cost.

Concept

Design

Build

Handover

TIME

Cost / Benefits Relationship.

Year 1

Year 2

Year 3 Costs

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Year 4

Year 5

Benefits

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Apples for Apples

Apples for Apples

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Consider • • • • •

Lights Doors Partitions Ceiling Vinyl Installer

Design Brief Table 1 - Selected airborne particulate cleanliness classes for cleanrooms and clean zones ISO

Maximum concentration limits (particles/m³ of air) for particles equal to and larger than the considered sizes

Classification shown below (concentration limits are calculated in accordance with equation (1) in 3.2) number (N)

BS5295

209 E

Note Blue figures relate to particles (ft³) and superseeded (or existing) Standards/Guides

0.1 µm ISO Class 1

0.2µm

10

0.3

ISO Class 2

100

ISO Class 3

1 000

0.3µm

0.5µm

1µm

2

0.06

2.8

24

0.07

10

0.3

4

0.1

28

237

6.7

102

2.9

35

1

8

5µm

0.22

0

M1.5 1

ISO Class 4

10 000

284

2 370

67.3

1 020

28.9

352

10

83

2.3

0

ISO Class 5

100 000

2841

23 700

673

10 200

289

3 520

100

832

23.6

29

0.8

1 000 000 28409 237 000

6732

102 000

2897

ISO Class 6

US FED

C

M2.5 10

D

M3.5 100

E/F

35 200

1000

8 320

236

293

8.3

M4.5 1 000

G/H

352 000

10000

83 200

2363

2 930

83

M5.5 10 000

J

ISO Class 8

3 520 000 100000

832 000

23636

29 300

832

M6.5 100 000

K

ISO Class 9

35 200 000 1000000 8 320 000 236363 293 000

8323

ISO Class 7

NOTE: Uncertainties related to the measurement process require that concentration data with no more than three significant figures be used in determining the classification level. * at rest conditions

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Design brief • • • • • •

Air Change Rate 20 min Recovery Cleaning Processes & Suitability Servicing & Maintenance Operational Costs Doms Lecture

People Generated Matter • 250,000 particles of 0.5µØ /min @ rest • 750,000 – 1,000,000 of 0.5µØ/min motion • Particles can carry bacteria • Material In • Dirty Process

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Layout considerations

Max velocity 0.3m/s

MSC HLF

MSC

Site positioning • • • • • •

Drainage Electrical Supply Heating Fresh Air Inlet Process Services Deliveries & Despatch

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Tender Appraisal • Discounts less quality • Price deviation 7% maximun • Project Programme

Schematic Drawings

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Prelims.

Work Packages

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Monthly Customer Satisfaction Review… • Communication • Design quality • Build quality • No surprises • Programme • General satisfaction

Validation Awareness • • • • •

CTBC Approved Engineers Particle counting under HEPAs Long Recovery Operational State Transient Conditions

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