CSA/ANSI LC 6:08

(reaffirmed 2018)

Natural gas operated diaphragm pumps

Legal Notice for Standards

Canadian Standards Association (operating as “CSA Group”) develops standards through a consensus standards development process approved by the Standards Council of Canada. This process brings together volunteers representing varied viewpoints and interests to achieve consensus and develop a standard. Although CSA Group administers the process and establishes rules to promote fairness in achieving consensus, it does not independently test, evaluate, or verify the content of standards.

Disclaimer and exclusion of liability

This document is provided without any representations, warranties, or conditions of any kind, express or implied, including, without limitation, implied warranties or conditions concerning this document’s fitness for a particular purpose or use, its merchantability, or its non-infringement of any third party’s intellectual property rights. CSA Group does not warrant the accuracy, completeness, or currency of any of the information published in this document. CSA Group makes no representations or warranties regarding this document’s compliance with any applicable statute, rule, or regulation.

IN NO EVENT SHALL CSA GROUP, ITS VOLUNTEERS, MEMBERS, SUBSIDIARIES, OR AFFILIATED COMPANIES, OR THEIR EMPLOYEES, DIRECTORS, OR OFFICERS, BE LIABLE FOR ANY DIRECT, INDIRECT, OR INCIDENTAL DAMAGES, INJURY, LOSS, COSTS, OR EXPENSES, HOWSOEVER CAUSED, INCLUDING BUT NOT LIMITED TO SPECIAL OR CONSEQUENTIAL DAMAGES, LOST REVENUE, BUSINESS INTERRUPTION, LOST OR DAMAGED DATA, OR ANY OTHER COMMERCIAL OR ECONOMIC LOSS, WHETHER BASED IN CONTRACT, TORT (INCLUDING NEGLIGENCE), OR ANY OTHER THEORY OF LIABILITY, ARISING OUT OF OR RESULTING FROM ACCESS TO OR POSSESSION OR USE OF THIS DOCUMENT, EVEN IF CSA GROUP HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES, INJURY, LOSS, COSTS, OR EXPENSES.

In publishing and making this document available, CSA Group is not undertaking to render professional or other services for or on behalf of any person or entity or to perform any duty owed by any person or entity to another person or entity. The information in this document is directed to those who have the appropriate degree of experience to use and apply its contents, and CSA Group accepts no responsibility whatsoever arising in any way from any and all use of or reliance on the information contained in this document.

CSA Group is a private not-for-profit company that publishes voluntary standards and related documents. CSA Group has no power, nor does it undertake, to enforce compliance with the contents of the standards or other documents it publishes.

Intellectual property rights and ownership

As between CSA Group and the users of this document (whether it be in printed or electronic form), CSA Group is the owner, or the authorized licensee, of all works contained herein that are protected by copyright, all trade-marks (except as otherwise noted to the contrary), and all inventions and trade secrets that may be contained in this document, whether or not such inventions and trade secrets are protected by patents and applications for patents. Without limitation, the unauthorized use, modification, copying, or disclosure of this document may violate laws that protect CSA Group’s and/or others’ intellectual property and may give rise to a right in CSA Group and/or others to seek legal redress for such use, modification, copying, or disclosure. To the extent permitted by licence or by law, CSA Group reserves all intellectual property rights in this document.

Patent rights

Attention is drawn to the possibility that some of the elements of this standard may be the subject of patent rights. CSA Group shall not be held responsible for identifying any or all such patent rights. Users of this standard are expressly advised that determination of the validity of any such patent rights is entirely their own responsibility.

Authorized use of this document

This document is being provided by CSA Group for informational and non-commercial use only. The user of this document is authorized to do only the following:

If this document is in electronic form:

• load this document onto a computer for the sole purpose of reviewing it;

• search and browse this document; and

• print this document if it is in PDF format.

  Limited copies of this document in print or paper form may be distributed only to persons who are authorized by CSA Group to have such copies, and only if this Legal Notice appears on each such copy.

  In addition, users may not and may not permit others to

• alter this document in any way or remove this Legal Notice from the attached standard;

• sell this document without authorization from CSA Group; or

• make an electronic copy of this document.

If you do not agree with any of the terms and conditions contained in this Legal Notice, you may not load or use this document or make any copies of the contents hereof, and if you do make such copies, you are required to destroy them immediately. Use of this document constitutes your acceptance of the terms and conditions of this Legal Notice.

First Edition - 2008

The standards set forth herein apply to the first edition of the Standard for Natural Gas Operated Diaphragm Pumps. Following their preparation by the supervising Technical Committee, they were accepted by the American National Standards Institute (ANSI), and subsequently approved.

Approved August 25, 2008

American National Standards Institute, Inc.

Standard Developer CSA AMERICA INC.

8501 East Pleasant Valley Road Cleveland, Ohio 44131

Published - September 2008

Copyright © 2008 CSA America, Inc.

Permission is granted to republish material herein in laws or ordinances, and in regulations, administrative orders, or similar documents issued by public authorities. Those desiring permission for other republication should consult CSA America, Inc., 8501 East Pleasant Valley Road, Cleveland, Ohio 44131.

American National Standards Insititute

The American National Standards Institute (ANSI), Inc. is the nationally recognized coordinator of voluntary standards development in the United States through which voluntary organizations, representing virtually every technical discipline and every facet of trade and commerce, organized labor and consumer interests, establish and improve the some 10,000 national consensus standards currently approved as American National Standards.

ANSI provides that the interests of the public may have appropriate participation and representation in standardization activity, and cooperates with departments and agencies of U.S. Federal, state and local governments in achieving compatibility between government codes and standards and the voluntary standards of industry and commerce.

ANSI represents the interests of the United States in international nontreaty organizations such as the International Organization for Standardization (ISO) and the International Electrotechnical Commission (IEC). The Institute maintains close ties with regional organizations such as the Pacific Area Standards Congress (PASC) and the Pan American Standards Commission (COPANT). As such, ANSI coordinates the activities involved in the U.S. participation in these groups.

ANSI approval of standards is intended to verify that the principles of openness and due process have been followed in the approval procedure and that a consensus of those directly and materially affected by the standards has been achieved. ANSI coordination is intended to assist the voluntary system to ensure that national standards needs are identified and met with a set of standards that are without conflict or unnecessary duplication in their requirements.

Responsibility of approving American National Standards rests with the

American National Standards Institute, Inc.

25 West 43rd Street, Fourth Floor New York, NY

10036

Preface

This publication represents a basic standard for safe operation, substantial and durable construction, and acceptable performance of natural gas operated diaphragm pumps. It is the result of years of experience in the manufacture, testing, installation, maintenance, inspection and research on natural gas operated diaphragm pumps designed for the utilization of gas. There are risks of injury to persons inherent in some appliances that, if completely eliminated, would defeat the utility of the appliance. The provisions in this Standard are intended to reduce such risks while retaining the normal function of the appliance.

Nothing in this standard is to be considered in any way as indicating a measure of quality beyond compliance with the provisions it contains. It is designed to allow compliance of natural gas operated diaphragm pumps, the construction and performance of which may exceed the various provisions specified herein. In its preparation, full recognition has been given to possibilities of improvement through ingenuity of design. As progress takes place, revisions may become necessary. When they are believed desirable, recommendations should be forwarded to CSA America, Inc., 8501 East Pleasant Valley Road, Cleveland, Ohio 44131. A proposal form is provided in the back of this document.

Safe and satisfactory operation of natural gas operated diaphragm pumps depends to a great extent upon its proper installation, and it should be installed in accordance with the manufacturers’ installation instructions, and local municipal building codes.

Users of this American National Standard are advised that the devices/products/activities within its scope may be subject to regulation at the Federal, state or local level. Users are strongly urged to investigate this possibility through appropriate channels. In the event of a conflict with this standard, the Federal, state or local regulation should be followed.

CAUTION NOTICE: This American National Standard may be revised or withdrawn at any time. The procedures of the American National Standards Institute, Inc., require that action be taken to reaffirm, revise or withdraw this standard no later than five (5) years from the date of approval. Purchasers of American National Standards may receive current information on all standards by calling or writing the American National Standards Institute, Inc., 25 West 43rd Street, Fourth Floor, New York, N.Y. 10036, (212) 642-4900.

EFFECTIVE DATE: An organization using this standard for product evaluation as a part of its certification program will normally establish the date by which all products certified by that organization should comply with this standard.

History Of The Development Of The Standard For Natural Gas Operated Diaphragm Pumps

(This History is informative and is not part of the standard.)

In 2001, CSA International developed CSA Requirement 2.01 for natural gas-operated diaphragm pumps, and was used for design certification testing of natural gas-operated diaphragm pumps by CSA International. In 2006, interest was indicated to develop a nationally recognized standard. CSA International relinquished its requirements to CSA America, Inc., to undertake the effort to develop a national standard. A working group of interested manufacturers was assembled to develop a standard based on the requirement.

In October 2006, CSA America informed the American National Standards Institute (ANSI) that it was undertaking the project of standards development for natural gas operated diaphragm pumps under its Committee Process. As work progressed, CSA America established a Technical Committee on Natural Gas Operated Diaphragm Pumps to oversee the development of the standard. The project was assigned the designation LC 6.

During its July 2007 meeting, the working group recommended to its Technical Committee that the draft Standard for Natural Gas Operated Diaphragm Pumps be distributed for review and comment.

During its August 2007 meeting, the Technical Committee accepted the recommendation of the working group and adopted the draft standard for distribution for review and comment. The draft standard was subsequently distributed for review and comment during November 2007.

At its May 2008 meeting, the Technical Committee considered comments received during the review and comment period and agreed to editorially revise the draft standard. The Technical Committee then adopted the revised draft standard for submittal to ANSI for approval.

This, the first edition of the Standard for Natural Gas Operated Diaphragm Pumps, was approved by the American National Standards Institute on August 25, 2008.

The following identifies the designation and year of the standard.

ANSI LC 6–2008

ii

Natural Gas Diaphragm Pump Technical Committee

Ronnie Ray Frazier Atmos Energy Chairman

S. Ron Caudle Southern California Gas Company

Chad Clark Ingersoll-Rand Company Leonard Galvan Wilden Pump & Engineering LLC Greg Hughes Warren Rupp, Inc.

Nanye Jones CanWest Pumping Systems

Randy McKay Rytech Technologies

Bryce Ritzema John Brooks Co. Ltd.

Dawn Svenkeson Graco Minnisota Inc.

Jeff Willoughby Toromount Energy Systems

iii

Contents

Part I Construction

Page

1. Scope 1

2. General 1

3. Equipment And Data To Be Furnished By The Manufacturer 2

4. Assembly 2

5. Connections 2

6. Bolts, Nuts And Screws 3

7. Materials 3

8. Instructions And Service Manuals 4

9. Marking 5

Part II Performance

1. General 7

2. Test Gases 7

3. Strength And Deformation 7

4. Leakage 9

5. Continued Operation 10

6. Elastomeric Materials 10

7. Marking Material Adhesion And Legibility 12

Tables

Table I Minimum Thread Length For American National Standard Pipe Threads 14

Table II Minimum Thread Length For British Standard Pipe Threads 14

Table III Turning Effort 15

Table IV Static Load For Bending Moment 15

Part III Manufacturing And Production Tests 17

EXHIBIT A List of Reference Standards 19

Part IV Definitions 21

APPENDIX A Table of Conversion Factors 23

NOTE

This standard contains SI (Metric) equivalents to the yard/pound quantities, the purpose being to allow the standard to be used in SI (Metric) units. (Standard for use of the International System of Units (SI): The Modern Metric System, IEEE/ASTM SI I0 or Metric Practice Guide, CAN/CSA Z234.1 are used as a guide in making metric conversion from yard/pound quantities.) If a value for a measurement and an equivalent value in other units, the first stated is to be regarded as the requirement. The given equivalent value may be approximate. If a value for a measurement and an equivalent value in other units, are both specified as a quoted marking requirement, the first stated unit, or both shall be provided.

v

American National Standard For Natural Gas Operated Diaphragm Pumps

Part I: Construction

1. Scope

   1.1.1

   This Standard applies to natural gas operated diaphragm pumps, herein after referred to as pumps, which are constructed entirely of new, unused parts and materials.

   
   

   1.1.2

   This Standard applies to pumps powered by pressurized natural gas, either wellhead or utility grade, pumping process fluids as specified by the manufacturer. (See Part IV, Definitions.)

   
   

   1.1.3

   This Standard applies to pumps with a maximum rated operating gas pressure not exceeding 150 psi (10.342 Bar).

   
   

   1.1.4

   Pumps complying with the provisions of this Standard shall be considered as having an operating ambient temperature range of 32°F (0°C) to 125°F (51.5°C), unless a lower minimum allowable ambient temperature, or a higher maximum allowable ambient temperature, or both, are specified by the manufacturer, (see 2.1.2).

   
   

   1.1.5

   If a value for measurement as given in this Standard is followed by an equivalent value in other units, the first stated value is to be regarded as the specification.

   
   

   1.1.6

   All references to “psi”(“Bar”) throughout this Standard are to be considered gauge pressure, unless otherwise specified.

   
   

2. General

1.2.1

The construction of parts not covered by this Standard shall be in accordance with reasonable concepts of safety, substantiality and durability.

All specifications as to construction set forth herein may be satisfied by the construction actually prescribed or such other construction as will provide at least equivalent performance.

1.2.2

The mechanisms of pumps shall be protected by substantial enclosures so as to prevent interference with the safe operation of the pumps.

1