Painting General Technical Requirement


Reference Documents  
3EQ68002 Painting and Coating Philosophy
4WEQ-6804 Painting and Corrosion Protection for Operating Temperatures to 427C (800F)
  1. Documentation
    1. Provide project specific painting specifications in the contract documents.
    2. Paint schedule completely filled out by Air Products and contractor.
  2. Shop painting
    1. Surface preparation if abrasive blasting is permitted the contractor shall not use silica sand.
    2. Paint system is typically one coat of epoxy mastic primer with one coat of urethane, or as specified in Specification 600.002 if addressed. Some equipment and materials may require intermediate coat of paint. Need to review the product sheets for the recoat times.
    3. Verify the surface preparation has been completed properly and to the right level of cleanliness.
    4. Are we brushing or spraying. NOTE: in some cases spraying is not permitted by local or state regulation.  Specification 600.002 may address and/or verify with a competent person.
    5. Refer to Specification 4WEQ-6804 for Painting QC
    6. Thermal protection may be required for mainly piping and equipment that will be insulated.
    7. Equipment typically with operating up to 250 degrees Fahrenheit get a zinc prime coat, intermediate coat and finish urethane coat.
  3. Field Painting
    1. All materials used are per specifications and contract drawings. If conflict occurs contact the designated design engineer to assist in clarification.
    2. Make sure contractor uses drop cloths to protect equipment, conduit, piping and other materials from paint splatter.
    3. Contractor shall submit a painting inspection sheet daily on items painted that day. See specification 4WEQ-6804 for more details
    4. Refer to contract drawing and Table 1 in 4WEQ-6804 for DFT (Dry Film Thickness) requirements for equipment field items.
    5. Review specifications for corrosion protection under thermal insulation. This is a project specific requirement.
  4. Re-Paint and Touch-up Painting
    1. Check existing paint for lead hazard. Project Engineering shall be notified if lead paint is encountered.
    2. Has the cleaning method (abrasive blasting, power tool, water wash, wire brush, etc) been agreed to and as per contract discussions and specifications?
    3. Painting can be by brushing or spraying.

NOTE: in some cases spraying is not permitted by local or state regulation.  Section 2 may address and/or verify with a competent person.

  1. No Methyl Ethyl Ketone (MEK) is allowed on the site. Manufactured thinners only are to be used.
  2. Special precautions and/or work permits shall be utilized around air suctions.
  3. Remove all oils, sealant; weld spatter, mildew, and containments before application.
  4. No runs, sags, splatter and drip a smooth paint finish.
  5. Surrounding areas and equipment are protected; spraying presents greater risk of drift.
  6. Disposal of paint cans and debris is by Air Products to an authorized disposal site.
    1. Contact Environmental, Health and Safety Engineer for authorized waste disposal methods.
  7. Paint and solvents stored in dike or tub out of direct heat and sunlight.


  1. QC Documentation


  1. Take pictures and place into QC file. Areas where issues most often occur are around hold down straps, cold box faces, touch-up areas, etc.
  2. Completed Paint Schedule. 4WEQ-6804
  3. Painting inspection report sheet. 4WEQ-6804
  4. Copies of the paint schedule in 4WEQ-6804
  5. Copies of the record of paint application form in 4WEQ-6804
  6. Copies of the contractor daily log as given in 4WEQ-6804




Other Info

Document Category Engineering
Document Target Users

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