UL 331B
Strainers for Diesel Fuel, Biodiesel Fuel, Diesel/Biodiesel Blends with Nominal Biodiesel Concentrations up to 20 Percent (B20), Kerosene, and Fuel Oil

DETAILS
Edition Number:1SCC Approved:--
Edition Date:2015-02-05DOD Approved: --
Price Code:AANSI Approved: 2015-02-05
Type:ulstd

  • SCOPE

    1 Scope

    1.1 These requirements cover complete, self-contained strainer or filter assemblies intended for use with the fuels designated in 1.2. Although these devices are designated strainers, they may be either strainers or filters according to the common terminology of the industry.

    1.2 Strainers and filter assemblies covered by these requirements are intended for use with one or more of the following:

    a)    Diesel fuel and diesel/biodiesel blends with nominal biodiesel concentrations up to 5 percent (B0 – B5) formulated in accordance with the Standard Specification for Diesel Fuel Oils, ANSI/ASTM D975;

    b)    Diesel/biodiesel blends with nominal biodiesel concentrations from 5 percent up to 20 percent (B6 – B20) formulated in accordance with the Standard Specification for Diesel Fuel Oil, Biodiesel Blends (B6 – B20), ANSI/ASTM D7467;

    c)    Biodiesel (B99.9/B100) formulated in accordance with the Standard Specification for Biodiesel Fuel Blend Stock (B100) for Middle Distillate Fuels, ANSI/ASTM D6751;

    d)    Kerosene formulated in accordance with the Standard Specification for Kerosine, ANSI/ASTM D3699;

    e)    Fuel oil (heating oil) formulated in accordance with the Standard Specification for Fuel Oils, ANSI/ASTM D396.

    1.3 These requirements do not cover the following:

    a)    Strainers for handling liquids under cryogenic conditions;

    b)    Straniers for marine use;

    c)    Strainers for automotive fuel lines;

    d)    Strainers for handling refrigerants;

    e)    Strainers for use in such facilities as chemical, petrochemical, petroleum, and utility power plants;

    f)    Strainers for use in fluid-power (hydraulic and pneumatic) applications;

    g)    Strainers or filter assemblies for use with gasoline or gasoline/ethanol blends, which are covered under the Outline of Investigation for Strainers for Gasoline and Gasoline/Ethanol Blends with Nominal Ethanol Concentrations Up to 85 Percent (E0 – E85), UL 331A

    h)    Strainers or filter assemblies for use with LP-Gas, Natural Gas, Manufactured Gas, and Anhydrous Ammonia, which are covered under the Standard for Strainers for Flammable Fluids and Anhydrous Ammonia, UL 331.

  • TABLE OF CONTENTS
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    • Cover
    • Transmittal
    • Table of Contents
      • Body
        • INTRODUCTION
          • 1 Scope
          • 2 Components
          • 3 Units of Measurement
          • 4 Undated References
        • CONSTRUCTION
          • 5 General
          • 6 Materials
            • 6.1 Metallic materials
            • 6.2 Nonmetallic materials
            • 6.3 Casting impregnation materials
          • 7 Bodies and Covers
          • 8 Stuffing Boxes
          • 9 Springs
        • PERFORMANCE
          • 10 General
          • 11 Long Term Exposure Test
            • 11.1 General
            • 11.2 Samples
            • 11.3 Method
            • 11.4 Results
          • 12 Deformation and External-Leakage Test
          • 13 Hydrostatic-Strength Test
          • 14 Element-Collapse Test
          • 15 10-Day Moist Ammonia-Air Stress Cracking Test
        • MANUFACTURING AND PRODUCTION
          • 16 General
        • MARKING
          • 17 General
    • Strainers for Oil-Fired Heating Appliances