API 6FD – Specification for Fire Test for Check Valves – Descripción: API 6FD – Specification for Fire Test for Check Valves – API turn 1/4 week valve and non-metallic valve seat valve fire test. Fire Test for Quarter-Turn Valves and Valves Equipped with Nonmetallic seats. Specification for Fire Test for Check Valves API SPECIFICATION 6FD FIRST EDITION, FEBRUARY REAFFIRMED: SEPTEMBER

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With respect to particular circumstances, local, state, and federal laws and regulations should be reviewed. API is apii undertaking to meet the duties of employers, manufacturers, or suppliers to warn and properly train and equip their employees, and others exposed, concerning health and safety risks and precautions, nor undertaking their obligations under local, state, or federal laws. Information concerning safety and health risks and proper precautions with respect to particular materials and conditions should be obtained from the employer, the manufacturer apl supplier of that material, or the material safety data sheet.

Nothing contained in any API publication is to be construed as granting any right, by implication or otherwise, for the manufacture, sale, or use of any method, apparatus, or product covered by letters patent. Neither should anything contained in the publication be construed as insuring anyone against liability for infringement ap letters patent.

Generally, API standards are reviewed and revised, reaffirmed, or withdrawn at least apk five years. Sometimes a one-time extension of up to two years will be added to this review cycle.

This publication will no longer be in effect five years after its publication date as an operative API standard or, where an extension has been granted, upon republication.

Status of the publication can be ascertained from the API Authoring Department [telephone This document was produced under API standardization procedures that ensure appropriate notification and participation in the developmental process and is designated as an API standard. Questions concerning the interpretation of the content of this standard or comments and questions concerning the procedures under which this standard was developed should be directed in writing to the director of the Exploration and Production Department, American Petroleum Institute, North Pearl, SuiteDallas, Texas Requests for permission to reproduce or translate all or any part of the material published herein should also be addressed to the director.

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Every effort has been made by the Institute to assure the accuracy and reliability of the data contained in them; however, the Institute makes no representation, warranty, or guarantee in connection with this publication and hereby expressly disclaims any liability or responsibility for loss or damage resulting from its use or for the violation of any federal, state, or municipal regulation with which this publication may conflict. API standards are published to facilitate the broad availability of proven, sound engineering and operating practices.

These standards are not intended to obviate the need for applying sound engineering judgment regarding when and where these standards should be utilized. The formulation and publication of API standards is not intended in any way to inhibit anyone from using any other practices.


Any manufacturer marking equipment or materials in conformance with the marking requirements of an API standard is solely responsible for complying with all the applicable requirements of that standard. API does not represent, warrant, or guarantee that such products do in fact conform to the applicable API standard.

Larger Wafer Type Check Valves This edition of Spec 6FD is the first edition and was approved by letter ballot in September Other standards under the jurisdiction of this committee include: This specifcation shall become effective on the date printed on the cover but may be used voluntarily from the date of distribution.

API Spec 6FD (R2013)

It has been of great usefulness in minimizing fire hazards associated with petroleum processing. It has also been a universal sealing material, compatible with most petroleum fluid services.

Certain serious adverse health effects are associated with asbestos, among them the serious and often fatal diseases of lung cancer, asbestosis, and mesothelioma a cancer of the chest and abdominal linings.

The degree of exposure to asbestos varies with the product and the work practices involved. Consult the most recent edition of the U. There are currently in use and under development a number of substitute materials to replace aoi in certain applications.

API-6FD | Specification for Fire Test for Check Valves | Document Center, Inc.

Manufacturers and users are encouraged to develop and use effective substitute materials which can meet the specifications for, and operating requirements of, the equipment to which they would apply. Safety and health information with respect to particular products or materials can be obtained from the employer, the manufacturer or supplier of that product or material, or the material safety data sheet.

The performance requirements of this document are intended to establish standard limits of acceptability regardless of size or pressure rating.

This document establishes acceptable levels of leakage through the test valve and also external leakage after exposure to a fire for a minute time period. The burn period has been established on the basis that it represents the maximum time required to extinguish most fires. Fires of greater duration are considered to be of a major magnitude with consequences greater than those anticipated in this test. For larger size valves, three blocks shall be used, as shown in Figures 2 or 4.

Piping upstream of the test valve larger than one inch 25 mm nominal pipe size or one-haif of valve nominal size whichever is smaller must be enveloped in flame for a distance of at least six inches mm.

For the test, it may be necessary to modify this joint to eliminate leakage. The test setup shall include l l h ” 38 mm cube calorimeter blocks made of carbon steel with a thermocouple located in the cen- 3.

Close valves Items 16 and Open valves Items 5 and 6 to flood the system and purge the air. Impingement of water or steam from external leakage onto flame thermocouples or calorimeters can result in a substantial drop in the indicated temperature of the affected sensor seven if no actual drop in flame temperature has occurred.


Such drops in indicated temperature s shall he noted in the test report. The test may continue with no downward adjustment of the burner controls and provided that at least one flame thermocouple and one calorimeter are functioning.

Maintain this pressure during the burn and cool-down period. Momentary pressure losses are permissible, provided their cumulative recovery time is less than two minutes. Record the reading on the calibrated sight gauge Item 4. Empty the graduated downstream container Item Continue collecting water in the calibrated container for use in establishing the external leakage rate. Cooling may, at the manufacturer’s option, be natural or forced. Record the readings on the sight gauge Item 4 and the calibrated container Item Pressure regulator and relief.

Vessel for water 4. Piping arranged to provide vapor trap. Enclosure for test-horizontal clearance between any part of the valve and the enclosure shall be a minimum of 6 inches mm. Minimum height of enclosure shall be 6 inches mm above the top of the valve. Test valve mounted in its normal operating position. Fuel gas supply to burners Ref. Flame temperature thermocouples Ref.

API / 6FA / 6FD Conformity Certificate

Vent valve on test valve body cavity. Decrease the test pressure to the low test pressure value shown in Table 1. Measure and record the through valve and external leakages over a 5minute period.

Verify that the test valve has unseated, by observation of steady flow through the vent valve, then close the vent valve. Verify pressurization of the entire test valve body by briefly apk the body cavity vent valve Item 15and observing flow.

The test system, excluding the test valve, may be adjusted during the test period to keep the test within the limits specified herein. The maximum external leakage shall not be greater than the value shown below Ref. Leakage rates are milliliters per inch of nominal valve size per minute milliliters per millimeter of nominal valve size per minuteaverage over the duration of the particular test period.

Hot Spot API 6FA/6FD and API 607 review

A N P S 16 valve will qualify all larger sizes. Protection for test personnel shall be provided. Records of the test upon which certifications are based shall be available for purchaser’s review on request. Note that the comma is used as a decimal marker for metric data. SI equivalents have also been included in all tables. English units are in all cases preferential and shall be the standard in this specification.

The factors used for conversion of English units to SI units are listed below: Customan, 1 inch in. For the purpose of this specification, the PN designations relate to pressure classes, and the DN designations relate to NPS, or nominal pipe sizes, as follows: