Protal 7900 HT by Denso

High Temperature Pipeline Coating up to 302°F (150°C). Used on girth welds, pipe, fittings, valves and fabrication.  
  • Description

    Denso Protal 7900HT is a VOC free, 100% solids epoxy coating for pipelines operating at higher temperatures. It is a high-build liquid coating that can be hand or spray applied in one coat in the field or shop. It cures fast to allow quick backfill when applied to hot pipe.

    Uses

    Spray or hand applied to pipelines operating at temperatures up to 250°F (121°C). Used on girth welds, pipe, fittings, valves and fabrication.

    Features

    • High build (up to 40 mils in one coat)
    • Can be spray or hand applied
    • Excellent adhesion
    • Service temperature up to 302°F (150°C)
    • Very low permeability
    • High abrasion resistance
    • Safe and environmentally responsible
    • Does not shield cathodic protection

     


  • Application

    1. By Hand:
      Prepare surfaces by grit blasting to a clean near white finish, SSPC-SP 10/NACE No. 2. Mix each of the base and hardener to an even consistency. Add the hardener to base and mix until an even color is achieved making sure all sides of container are scraped. Product shall be applied to surfaces ranging from 40°F (4°C) to 220°F (105°C) at a minimum of 30 mils. Immediately pour mixed material onto surface and brush, trowel or roll to required mil thickness. A wet film thickness gauge should be used to measure mil thickness.
       
    2. Spray:
      Prepare surfaces by grit blasting to a clean near white finish, SSPC-SP 10/NACE No. 2. The equipment should be a plural component airless spray unit with a proportioning pump capable of a volume mixing ratio of 3:1. Standard ancillary equipment should include minimum 10 gallon hoppers, static mixers, whip hose, and mastic gun. (Applicator should consult with Denso regarding recommended equipment). Product shall be applied to surfaces ranging from 40°F (4°C) to 220°F (105°C). A wet on wet spray technique should be used to achieve a minimum thickness of 30 mils. The coating thickness should be measured using a wet film thickness gauge.


  • Technical Data

    PropertiesData

    Solids Content

    100%

    Base Component - unmixed @ 77°F (25°C)
         Specific Gravity
         Viscosity
         Color


    1.54
    197,000 cps
    White

    Hardener Component - unmixed @ 77°F (25°C)
         Specific Gravity
         Viscosity
         Color


    1.43
    90,000 cps
    Black

    Mixed Material - mixed @ 77°F (25°C)
         Specific Gravity
         Viscosity
         Color


    1.51
    164,000 cps
    Gray

    Mixing Ratio by Volume

    3 parts base: 1 part hardener

    Theoretical Coverage

    14 ft2 / 30 mils / liter

    Cure Times
         Pot Life @ 77°F (25°C), 100 gram
         Handling Time @ 77°F (25°C)


    40 to 45 minutes
    6 to 8 hours

    Theoretical Coverage

    14 ft2 (1.3 m2) / 30 mils / liter

    Thickness
        
    Minimum
         Maximum

      
    30 mils
    60 mils

    Holiday Detection

    100 volts / mil

    Hardness (ASTM 2240)

    Shore D min. 85

    Resistance to Cathodic Disbondment

    Excellent

    Abrasion Resistance

    Excellent

    Adhesion to Steel

    3,030 psi

    Maximum Service Temperature

    250°F (121°C)

    Intermittent Maximum Service Temperature

    302°F (150°C)

    Pot Life @ 77°F (25°C)

    30 minutes

    Initial Handling @ 77°F (25°C)

    4 to 6 hours

    Initial Handling @ 220°F (104°C)

    15 to 20 minutes


  • Handling & Storage
     

    PropertiesData

    Storage

    Minimum 24 months when stored in original containers above 40°F (4°C). On job-site where temperatures are below 68°F (20°C), product must be kept warm to mix properly.

    Cleaning

    Clean equipment with solvent cleaner (Xylene 95%, Butanol 5%).

    Packaging

    1.0 liter and 2.0 liter kits. For spray applications, sold in 75 liter and 800 liter drums. Special kit sizes are available on request.

    Safety

    MSDS Denso Protal 7900HT “A”
    MSDS Denso Protal 7900HT “B”