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SSPC Guide 6, Guide for Containing Surface Preparation Debris Generated During Paint Removal Operations (October 1, 2004)
Guide 6 was subject to several significant changes. These changes are of particular interest to those specifying or reviewing containments design drawings, or involved with field erection. The following highlights the changes to Guide 6 by section number:
3.3. Referenced Documents - Updated to include: SSPC Guide 16, Guide to Selection of Dust Collectors, SSPC TU-7, Conducting Ambient Air, Soil, and Water Sampling During Surface Preparation and Paint Disturbance Activities, and updated ANSI standards.
4.2.2.4 Class 4W - The revised Guide 6 ads a new Class 4 containment system for wet methods of preparation, Class 4W. Class 4W utilizes water penetrable walls, ceiling and floors, as applicable, with flexible framing and natural air flow. Class 4W is designed for pressure washing when the goal is to collect dislodged debris while allowing water to pass through.
5.3.2 Type B2 - Air Penetrable - Tightly Woven and Open Mesh: The revised Guide 6 expands the definition of air penetrable containment materials (B2) to two classifications. B2a is Air Penetrable Tightly Woven - This is a woven tarpaulin that isn't coated but is capable of retaining airborne particles. Tightness of the weave may be compromised with extended use. B2b - Open Mesh - is formed or woven to allow air flow but may retain some airborne particulates. This class involves wind screens (e.g., 85% tarpaulins).
Type B3b - Water Permeable: the revised Guide 6 modifies the definition of water permeable to define it as open mesh material formed or woven with openings less than 25 mils (100 micrometers). Material is capable of collecting debris and allowing water to pass through. It is used in conjunction with the new Class 4W described above.
5.3.5.2 TypeE2 - Entryway Through Resealable Doors: Guide 6 has been revised to state" Entryways should not be sealed with "C"-clamps that can only be accessed from one direction.
This prohibits what had become a common practice of using an overlapping door with "C"-clamps in lieu of a truly resealable door.
5.5.7 Method G - Visual Assessment of Site Cleanliness - Ads a new section addressing visual assessments for site cleanliness.
5.6 Method for Assessing Efficiency of Debris Collection and Bulk Abrasive Recovery - DELETED - This section used to provide calculations for estimating efficiency of debris recovery.
7 NOTES - This section has been extensively revised to discuss updated ANSI standards guidance on air flow and ventilation.
It should be noted that Guide 6 still requires the specification writer
to establish minimum air movement requirements under Section 5.4.4. and
that simply invoking containment classes requiring air movement (i.e.
Class 1A) do not establish minimum air movement values (e.g. 60 fpm).
One approach may be to require the contractor to provide minimum air movement
necessary to achieve operator visibility as defined by the "Industrial
Ventilation, A Manual of Recommended Practice." This would suggest
minimum down draft ventilation of 50 to 80 fpm and cross draft of 100
fpm.
To purchase Guide 6, please visit sspc.org. or call SSPC at 1.877.281.7772.
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