Roof Vent Standards

This Standard specifies the minimum requirements for factory-built, single or multiple-piece roof vent flashings used to effect a permanent weather seal between the flashing and the vent pipe without the use of additional sealing materials around the vent pipe. Flashings...

INTRODUCTION This report addresses evaporative loss from internal floating-roof tanks (IFRTs) with closed vents, a subject not currently addressed by API. Nomenclature is provided in Appendix A. The API Manual of Petroleum Measurement Standards Chapter 19, Section 1 (19.1) addresses...

1.1 These requirements cover automatically operated roof vents for smoke and heat that fall into two general categories: mechanically-opened and gravity-opened. Mechanically-opened vents consist primarily of a body frame, one or more damper covers and hatches, and operating...

Scope and Purpose This Standard covers roof drains with integral overflows or air vents and specifies requirements for materials, physical characteristics, performance tests, and markings. The purpose of this Standard is to enhance health and safety by: (a) specifying acceptable...

This standard contains methodologies for estimating the total evaporative losses of hydrocarbons from external floating-roof tanks (EFRTs), freely vented internal floating-roof tanks (IFRTs), and domed external floating-roof tanks (domed EFRTs). The methodologies provide...

1.1 This practice covers procedures for calculating adjustment factors that account for the effects of fire-retardant treatment on bending strength of plywood roof sheathing. The adjustment factors calculated in accordance with this practice are to be applied to design values for untreated...

The information and drawings in this manual are presented primarily to illustrate the elements of construction and installation of commercial kitchen ventilation systems. The information is intended to encourage more standardization in installations and to call attention to the appropriate...

5.1 Fire-retardant-treatments are used to reduce the flame-spread characteristics of wood. Chemicals and redrying conditions employed in treatments are known to modify the strength properties of the wood product being treated. This practice establishes the procedures for determining adjustment...

5.1 This test method evaluates the ability of exterior vents that mount vertically or horizontally to resist the entry of embers and flame penetration through the vent. Note 3: A comparison study between the vertical air flow apparatus and a horizontal air flow apparatus, developed at...

This fire-test-response standard prescribes two individual methods to evaluate the ability of a gable end, crawl space (foundation) and other vents that mount on a vertical wall or in the under-eave area to resist the entry through the vent opening of embers and flame. The ability of...

1.1 This practice has been prepared for use by the designer, specifier, and applicator of Interior Radiation Control Coating Systems (IRCCS) for use in building construction. The scope contains instructions related to the use and installation of IRCCS that are sprayed, rolled, or brush applied....

General This standard establishes minimum requirements for material, design, fabrication, erection, and inspection for vertical, cylindrical, aboveground, closed- and open-top, welded storage tanks in various sizes and capacities for internal pressures approximating atmospheric pressure (internal...

Gas Vents UL 441 1.1 These requirements cover Types B and BW gas vents and Types B and BW gas vent roof jacks intended for venting gas appliances equipped with draft hoods to burn only gas. Type B vents are also intended for use with other Category I...