Advisory Council

April 5, 2009

Comments Off on Work Notices and Inspection

Work Notices and Inspection

A Primary Mission of the Council is to promote effective means of surface preparation in the maintenance industry using water and water/abrasive blasting techniques.

4.2 WORK NOTICE: The contractor shall post the notice at the ship’s quarterdeck or other designated location for each job or separate area at least four hours, but not more than 24 hours, prior to the start of work.

Checkpoints and final inspections shall be signed off by certified coating inspectors.

4.3.4 COATING INSPECTOR RESPONSIBILITIES: Coating inspectors are responsible for requirements listed in NSTM 631, Section 11.7.

4.13.2 Notify the Commanding Officer’s representative immediately when the contractor’s work is complete and the system, piping, or circuit is ready for activation to accomplish removal of tags.

Heavily rusted or corroded area, damaged metal and holes in the structure or piping shall be documented and provided to ship’s force and Responsible Contracting Authority to determine if further structural evaluation or NDT is warranted and for possible repair before surface preparation.

5.4.3 (Contamination Containment and Masking): Verify all surfaces within the scope of the project are IAW paragraphs 4.10 through 4.11.

6.3.2 Feather edges of adherent paint in adjacent areas remaining after cleaning.

9.3.3 All tests and inspections noting unsatisfactory conditions shall result in the termination and rescheduling of the checkpoint.

11.1.2 Coating imperfections found, which may cause premature coating failure, shall be corrected before the paint system is accepted using appropriate touch-up procedures specified in paragraph 7.12.

11.1.3 In order to pass the checkpoint, any Appendices required by the certified coating inspector shall be up to date or completed and submitted to QA.

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April 5, 2009

Comments Off on MSDS and Surface Preparation Methods

MSDS and Surface Preparation Methods

MSDS and manufacturer’s ASTM F 718 sheets, Shipbuilders and Marine Paints and Coating Product / Procedure Data Sheet for coating system being applied.

NOTE: IMPLEMENTING AUTHORITY WILL DESIGNATE SURFACE PREPARATION METHOD TO USE, METHOD 1 UHP WATER JETTING, OR METHOD 2 POWER TOOL CLEANING.

NOTE: The Responsible Implementing Authority shall have the authority to reject power tool cleaning in any inaccessible area if the surface can be shown to have adequate accessibility for UHP Water Jetting.

NOTE: Flash rusting shall not exceed a degree equal to SSPC-VIS 4 (Visual Reference for Steel Cleaned by Water Jetting) Standard WJ-2L.

If flash rusting occurs, the extent of the flash rust will determine the correct method of managing the flash rust.

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April 5, 2009

Comments Off on High Traffic Interior Decks

High Traffic Interior Decks

1.1 Cleaning, Surface Preparation and Painting Requirements for High Traffic Interior Decks.

MSDS and manufacturer’s ASTM F 718 sheets, Shipbuilders and Marine Paints and Coating Product / Procedure Data Sheet for Coating Systems Being Applied.

4.5.1 Record and restore existing painted labels, compartment designations, hull markings, and other painted information which will be removed or covered during cleaning and painting operations.

7.6 Excessive dry film thickness in a coat or cumulative coats shall be determined IAW Ref.

During application, immediately brush out any runs, drips, sags or puddles.

NOTE: STRIPE COAT IS NOT REQUIRED EXCEPT TO COVER WELD SEAMS AND EDGES WITHIN THE DECK AREA IF PRESENT.

Stripe coat by brush in areas not accessible by paint spray equipment.

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April 5, 2009

1 Comment

Inspector Responsibilities

A Primary Mission of the Council is to promote effective means of surface preparation in the maintenance industry using water and water/abrasive blasting techniques.

Checkpoints and final inspections shall be signed off by certified coating inspectors.

4.3.4 COATING INSPECTOR RESPONSIBILITIES: Coating inspectors are responsible for requirements listed in NSTM 631, Section 11.7.

4.10.1 Prevent contamination and surface damage of the ship’s equipment, components, and spaces during contamination-producing operations.

4.13.2 Notify the Commanding Officer’s representative immediately when the contractor’s work is complete and the system, piping, or circuit is ready for activation to accomplish removal of tags.

Heavily rusted or corroded area, damaged metal and holes in the structure or piping shall be documented and provided to ship’s force and Responsible Contracting Authority to determine if further structural evaluation or NDT is warranted and for possible repair before surface preparation.

7.5 OUT OF SPECIFICATION DRY FILM THICKNESS: Failure to meet minimum dry film thickness requirements will result in application of an additional coat or coats in deficient areas before the coat can pass DFT checkpoints.

11.2 For areas inaccessible by spray equipment and smaller than 4 square inches, apply one brush coat specified in Ref.

1. From the area to be repaired abrade a two-inch radius of the well-bonded adjacent coating by hand or power tool with a minimum of 40 grit sandpaper to a profile of 1 to 2.5 mils.

13.1.3 In order to pass the checkpoint, any Appendices required by the certified coating inspector shall be up to date or completed and submitted to QA.

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April 5, 2009

4 Comments

Maintenance Costs and Reform

A Primary Mission of the Council is to promote effective means of surface preparation in the maintenance industry using water and water/abrasive blasting techniques.

In Scotland last year a group of coatings manufacturers estimated the coatings maintenance market was $2 Billion Dollars.

The estimation for coatings going over water jetting surfaces was 510%.

While all three are necessary for good coatings performance.

It is the last component, the removal of invisible contaminants and removal of detrital material, that demands water and which requires REFORM and CHANGE.

Everybody in this room has been raised with dry abrasive blasting and dry abrasive blast standards.

All of these coating manufacturers have put coatings over, hundreds of thousands, if not millions, of square feet of various substraates which have been cleaned with water jetting and wet abrasive blasting.

There is flash rusting involved in all of that stuff but it really does not affect the moisture cured polyurethane coatings supplied by Wasser.

Wayne Senick- Back to the text book- this is an article on the first job where there was a five year joint warranty between the coating manufacturer and the contractor.

It was pretty pleasing to see that before cleaning we were at 80-90 µg/cm2 of chloride but every case, every case, we got below 4 µg/cm2.

They were water jetting with sea water.

I come in and ask the question, both to the abrasive and water jetting people, about applications with vacuum attachment.

Lydia Frenzel- I have talked a lot to contractors about how much does it cost for WJ on a square foot basis.

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April 5, 2009

Comments Off on UHP Equipment

UHP Equipment

A Primary Mission of the Council is to promote effective means of surface preparation in the maintenance industry using water and water/abrasive blasting techniques.

Operating conditions, cleaning rates, and performance differ substantially from standard equipment with several significant advantages applicable in todays environmentally and safety- conscious society.

Early in 1971, the first ultrahigh-pressure compact intensifier pumps were under development representing the only significant technological change in high pressure pumps in recent history.

Based upon the practical and economical use of prime movers, an operating pressure of 35,000 to 40,000 psi was selected, with maximum pump flow rates to 6 gpm.

Most frequently, this tool is equipped with two to four .009″ diameter nozzles and used to remove heavy, thick materials such as rubber or concrete.

The high speed jets of water cut through many energy-absorbing materials rapidly, and erode large quantities of the more stubborn materials much faster than low pressure/high volume water or grit blasting.

This same tool can be used to do “dental work” on concrete structures removing deteriorated concrete from spaulled areas while simultaneously providing a light surface scarification for new protective coatings.

the same ultrahigh-pressure pump can be used to remove a coating, lightly scarify, decontaminate, or erode deep into the concrete by simply changing the application tool/end effect.

The size of the nozzle used on the rotating lance is dependent upon the thickness and tensile adhesion of the coating.

High velocity jets are especially well suited for this type of use since the jet speed allows actual cutting of the rubber just prior to separation from the substrate.

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