Controls and Safety Devices for Automatically Fired Boilers

A N A M E R I C A N N A T I O N A L S T A N D A R D

ASME CSD-1–2006

(Revision of ASME CSD-1–2004)

Controls and Safety Devices for Automatically Fired Boilers

AN AMERICAN NA TIONAL S T AND ARD

Three Park Avenue • New York, NY 10016

Date of Issuance: December 29, 2006

The next edition of this Standard is scheduled for publication in 2008. There will be no addenda issued to this edition.

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The American Society of Mechanical Engineers Three Park Avenue, New York, NY 10016-5990

Copyright © 2006 by

THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS

All rights reserved Printed in U.S.A.

CONTENTS

Nonmandatory Appendices

1. Comparison of This Standard and ANSI Z21.13/CSA 4.9 29

2. Typical Fuel Trains 30

3. Manufacturer’s/Installing Contractor’s Report for ASME CSD-1 36

4. Recommended Preventive Maintenance Schedule 39

5. References 43

Index 44

FOREWORD

The major perils in operating automatically fired boilers are loss of water (low water), furnace explosion, overpressure, and overtemperature. Principal causes of accidents to automatically fired boilers are lack of proper controls and safety devices, lack of adequate maintenance, improperly trained operators, failure to test controls and safety devices, and complacency on the part of the operator due to long periods of trouble-free operation. It is believed that improved instrumenta- tion, controls and safety devices, proper operating procedures, and a clearer understanding of installation requirements by the manufacturers, installers, and operators can greatly reduce the chances of personal injury, damage to property, and loss of equipment from accidents.

It should be pointed out that any governmental jurisdiction has authority over any particular installation. Inquiries dealing with problems of a local character should be directed to the proper authorities of such jurisdictions.

Safety codes and standards are intended to enhance public health and safety. Revisions result from the committee’s consideration of factors such as technological advances, new data, and changing environmental and industry needs. Revisions do not imply that previous editions were inadequate.

The first edition of this Standard, which was approved by The American Society of Mechanical Engineers’ Committee on Controls and Safety Devices for Automatically Fired Boilers, was approved and designated as an ASME Standard by The American Society of Mechanical Engineers on April 29, 1977.

The second edition, which was approved by the American National Standards Institute (ANSI) on October 4, 1982, was issued on December 31, 1982. An addenda to the edition, CSD-1a–1984, was approved on August 17, 1984 and issued on November 15, 1984.

The third edition, which was approved by ANSI on November 17, 1988, was issued on February 15, 1989. The CSD-1a–1989 Addenda was approved on October 3, 1989 and issued on February 15, 1990. The CSD-1b–1990 Addenda was approved on June 21, 1990 and issued on December 1, 1990.

The fourth edition, which was approved by ANSI on February 28, 1992, was issued on June 15, 1992. The CSD-1a–1993 Addenda was approved on August 18, 1993 and issued on November 30, 1993. The CSD-1b–1994 Addenda was approved on June 20, 1994 and issued on September 30, 1994.

The fifth edition, which was approved by ANSI on February 6, 1995, was issued on June 30, 1995. The CSD-1a–1996 Addenda was approved on February 5, 1996 and issued on July 31, 1996. The CSD-1b–1996 Addenda was approved on July 16, 1996 and issued on December 20, 1996.

The sixth edition, which was approved by ANSI on January 30, 1998, was issued on April 14, 1998. The CSD-1a–1999 Addenda was approved on November 2, 1999 and issued on March 10, 2000. The CSD-1b–2001 Addenda was approved on July 30, 2001 and issued on November 30, 2001.

The seventh edition, which was approved by ANSI on January 17, 2002, was issued on April 15, 2002.

The eighth edition, which was approved by ANSI on August 9, 2004, was issued on April 15, 2005.

This ninth edition was approved by ANSI on September 13, 2006.

(06)

COMMITTEE ON CONTROLS AND SAFETY DEVICES FOR AUTOMATICALLY FIRED BOILERS

(The following is the roster of the Committee at the time of approval of this Standard.)

STANDARDS COMMITTEE OFFICERS

B. W. Moore, Chair

P. K. Fanning, Vice Chair

E. Cho, Secretary

R. E. Albert, U.S. Postal Service

STANDARDS COMMITTEE PERSONNEL

M. F. Mooney, State of Massachusetts, Department of Public

R. D. Austin, State of Colorado, Department of Labor and Employment, Division of Oil and Public Safety

D. C. Bixby, Gas Appliance Manufacturers Association

R. K. Black, Johnston Boiler Co.

P. C. Bourgeois, St. Paul Travelers

J. L. Cecilia, ITT Industries

J. C. Chicoine, Mestek, Inc.

E. Cho, The American Society of Mechanical Engineers

M. H. Diehl, Jr., Zurich Service Corp.

K. K. Donithan, Total Boiler Control, Inc.

P. K. Fanning, U.S. Naval Facilities Engineering Services Center

S. J. Guzinski, Alternate, U.S. Naval Facilities Engineering Services Center

J. M. Given, Jr., State of North Carolina, Department of Labor

R. S. Glass, Raypak, Inc.

L. J. Ashton, Alternate, Raypak, Inc.

J. P. Gorman, CSA International

G. M. Halley, SJI Consultants, Inc.

M. W. Hilton, Fulton Boiler Works, Inc.

M. L. Holloway, State of Oklahoma, Department of Labor

G. J. McCallum, ITT McDonnell and Miller

J. C. Merwin, Potter Electric Signal Co.

B. L. Mickelson, Honeywell International, Inc.

Safety

B. W. Moore, Hartford Steam Boiler Inspection and Insurance Co.

W. Barbato, Alternate, Hartford Steam Boiler Inspection and Insurance Co.

R. N. Mosher, R.N. Mosher and Associates

V. G. Newton, Chubb and Son

M. C. Polagye, FM Global

J. Safarz, CEC Consultants, Inc.

J. R. Puskar, Alternate, CEC Consultants, Inc.

D. A. Scearce, American Design Associates, LLC

D. Noyes, Alternate, American Design Associates, LLC

P. H. Schuelke, Weil McLain

B. J. Iske, Alternate, Weil McLain

J. C. Smelcer, Lochinvar, Corp.

1. R. Switzer, Jr., S-afe, Inc.

2. J. Tate, Karl Dungs, Inc.

K. J. Carlisle, Alternate, Karl Dungs, Inc.

T. K. Thompson, Underwriters Laboratories, Inc.

T. F. Hardin, Alternate, Underwriters Laboratories, Inc.

M. W. Valentino, Industrial Combustion

J. C. Stoeger, Alternate, Industrial Combustion

J. van Heijningen, Siemens Building Technologies, Inc.

J. A. Wagner, Fireye, Inc.

B. Neill, Alternate, Fireye, Inc.

HONORARY MEMBERS

T. W. Bukowski, Weber-Stephen Products, Co.

R. B. West, State of Iowa, Division of Labor Services

CORRESPONDENCE WITH THE CSDAFB COMMITTEE

General. ASME Codes and Standards are developed and maintained with the intent to represent the consensus of concerned interests. As such, users of this Standard may interact with the Committee by requesting interpretations, proposing revisions, and attending Committee meet- ings. Correspondence should be addressed to:

Secretary, CSDAFB Standards Committee

The American Society of Mechanical Engineers Three Park Avenue

New York, NY 10016-5990

Proposing Revisions. Revisions are made periodically to the Standard to incorporate changes that appear necessary or desirable, as demonstrated by the experience gained from the application of the Standard. Approved revisions will be published periodically.

The committee welcomes proposals for revisions to this Standard. Such proposals should be as specific as possible, citing the paragraph number(s), the proposed wording, and a detailed description of the reasons for the proposal including any pertinent documentation.

Interpretations. Upon request, the CSDAFB Committee will render an interpretation of any requirement of the Standard. Interpretations can only be rendered in response to a written request sent to the Secretary of the Standards Committee.

The request for interpretation should be clear and unambiguous. It is further recommended that the inquirer submit his/her request in the following format:

Subject: Cite the applicable paragraph number(s) and provide a concise description.

Edition: Cite the applicable edition of the Standard for which the interpretation is being requested.

Question: Phrase the question as a request for an interpretation of a specific requirement suitable for general understanding and use, not as a request for approval of a proprietary design or situation. The inquirer may also include any plans or drawings which are necessary to explain the question; however, they should not contain any proprietary names or information.

Requests that are not in this format will be rewritten in this format by the Committee prior to being answered, which may inadvertently change the intent of the original request.

ASME procedures provide for reconsideration of any interpretation when or if additional information which might affect an interpretation is available. Further, persons aggrieved by an interpretation may appeal to the cognizant ASME Committee or Subcommittee. ASME does not “approve,” “certify,” “rate,” or “endorse” any item, construction, proprietary device, or activity. Attending Committee Meetings. The CSDAFB Standards Committee regularly holds meetings that are open to the public. Persons wishing to attend any meeting should contact the Secretary

of the Standards Committee.

ASME CSD-1–2006 SUMMARY OF CHANGES

Following approval by the ASME CSDAFB Standards Committee, and after public review, ASME CSD-1–2006 was approved by the American National Standards Institute on September 13, 2006.

The 2006 edition of ASME CSD-1 includes editorial changes, revisions, and corrections introduced in ASME CSD-1–2004, as well as the following changes identified by (06).

Page Location Change

v Foreword Revised

1–5 Definitions (1) Definition of burner, mechanical draft, atmospheric added

1. Definitions of draft, mechanical and

   draft, natural, added

2. Definition of maximum fixed stop limit

   revised

3. Definition of recycle revised

4. Definition of relight revised

5. Definition of sediment trap added

6. Definition of upper set point limit

   revised

7. Definition of water heater revised

Figure 1 Added

6 CG-110 Revised

CG-130 Subparagraph (a) revised

CG-140 Title revised

CF-110(b) References to Tables CF-4 and CF-5 revised to Tables CF-1 and CF-2, respectively

CF-140 Revised in its entirety

1. Table CF-1 Table CF-4 redesignated as Table CF-1 and revised

2. Table CF-2 Table CF-5 redesignated as Table CF-2 and revised

revised

(3) Subparagraph (f) revised

Table CF-3 Table CF-1 redesignated as Table CF-3 and revised

Table CF-4 Table CF-2 redesignated as Table CF-4 and revised

references revised

(2) Subparagraph (e) revised

CF-520 Subparagraph (b), table reference revised

CF-530 Revised

Table CF-5 Table CF-3 redesignated as Table CF-5 and revised

CF-910 Second paragraph, table references revised

SPECIAL NOTE

The interpretations to ASME CSD-1 are included in this edition as a separate section for the user’s convenience.

ASME CSD-1–2006

CONTROLS AND SAFETY DEVICES FOR AUTOMATICALLY FIRED BOILERS

1. DEFINITIONS

   accepted: a boiler unit, equipment, or device is accepted when listed, labeled, or otherwise determined to be suit- able and safe by a nationally recognized testing agency. Field installations are accepted when approved by the authority having jurisdiction.

   air change: the quantity of air necessary to completely replace the air contained in the combustion chamber and associated flue passages.

   air shutter: an adjustable device for varying the flow of air.

   alarm: an audible or visible signal indicating an off-standard or abnormal condition.

   alarm circuit: a circuit that includes an alarm.

   annunciator: a device that indicates a condition, either normal or abnormal, by visual signals, audible signals, or both.

   ANSI: American National Standards Institute. approved: acceptable to the authority having jurisdiction. ASME: the American Society of Mechanical Engineers.

   atomizing media: a supplementary medium, such as steam or air, that assists in breaking the fuel oil into a fine spray.

   authorized inspection agency: the inspection agency approved by the appropriate authority of a state or municipality of the United States or a Province of Canada that has adopted this Standard.

   AWG: American Wire Gauge.

   bleed line: a line used to relieve pressure to the atmo- sphere, either manually or automatically.

   boiler: a closed vessel in which water is heated, steam is generated, steam is