ANSI CSA-B149.6-15-2015 Code for digester gas landfill gas and biogas generation and utilization (First Edition).pdf

1、ANSI/CSA B149.6-15Code for digester gas, landfill gas, and biogas generation and utilizationLegal Notice for StandardsCanadian Standards Association (operating as “CSA Group”) develops standards through a consensus standards development process approved by the Standards Council of Canada. This proce

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15、OADTHISDOCUMENTONTOACOMPUTERFORTHESOLEPURPOSEOFREVIEWINGITsSEARCHANDBROWSETHISDOCUMENTANDsPRINTTHISDOCUMENTIFITISIN0$ a few were changed.The requirements for the controls for Boilers, Waste Gas Burners, Engines, and Incinerators were taken out of the main text of the code and relocated to an Annex.

16、A requirement was modified to ensure that a waste gas burner has a pilot fuel (Natural Gas or Propane only, and not Biogas) that is reliable and is not just sparking the raw main gas. A requirement was added indicating that Manometers must always reliably indicate the system pressures, especially du

17、ring power outages, for plant personnel accessing gas rooms and for trouble shooting purposes etc.A requirement was expanded to ensure that a liquid filled manometer, which does not require external power, is only used. Incinerator Controls have been removed from the body of the code and put into An

18、nexes, which can be adopted by the Authority Having Jurisdiction (AHJ), if they so wish. Controls for Ventilation and Combustion Air have been removed from the body of the code and put into Annexes, which can be adopted by the AHJ, if they so wish. Requirements for compliance with piping design code

19、s have been updated to include Canadian and American standards.Requirements for compliance underground piping have been updated to include Canadian and American standards.The previous edition required instruments to measure the composition of the landfill gas for an explosive mixture but did not spe

20、cify what to do when it occurred. The system is now required to shutdown when the methane in the landfill gas is between 2.5% and 25% by volume. Hazardous areas requirements have been updated to include Canadian and American standards. This Code was prepared by the Technical Committee on Biogas Gene

21、ration and Utilization (B149.6), under the jurisdiction of the Strategic Steering Committee on Fuel-Burning Equipment, and has been formally approved by the Technical Committee. This Code has also been formally approved by the Interprovincial Gas Advisory Council and the American National Standards

22、Institute.The CSA B149.6 Code Committee, which is responsible for preparing this Code, consists of members of the provincial gas inspection authorities, biogas and waste management entities, certification organizations, and representatives from the Canadian and US federal government . This Code has

23、been formally approved by the Technical Committee on Biogas Generation and Utilization Code, by the Interprovincial Gas Advisory Council, and American National Standards Institute.Notes: (1) Use of the singular does not exclude the plural (and vice versa) when the sense allows.(2) Although the inten

24、ded primary application of this Code is stated in its Scope, it is important to note that it remains the responsibility of the users of the Code to judge its suitability for their particular purpose.(3) This Code was developed by consensus, which is defined by CSA Policy governing standardization Co

25、de of good practice for standardization as “substantial agreement. Consensus implies much more than a simple majority, but not necessarily unanimity”. It is consistent with this definition that a member may be included in the Technical Committee list and yet not be in full agreement with all clauses

26、 of this Code.(4) To submit a request for interpretation of this Code, please send the following information to inquiriescsagroup.org and include “Request for interpretation” in the subject line:(a) define the problem, making reference to the specific clause, and, where appropriate, include an illus

27、trative sketch; 2015 CSA GroupCode for digester gas, landfill gas, andbiogas generation and utilizationAugust 2015 xv(b) provide an explanation of circumstances surrounding the actual field condition; and(c) where possible, phrase the request in such a way that a specific “yes” or “no” answer will a

28、ddress the issue.Committee interpretations are processed in accordance with the CSA Directives and guidelines governing standardization and are available on the Current Standards Activities page at standardsactivities.csa.ca.(5) This Code is subject to review five years from the date of publication.

29、 Suggestions for its improvement will be referred to the appropriate committee. To submit a proposal for change, please send the following information to inquiriescsagroup.org and include “Proposal for change” in the subject line:(a) Standard designation (number);(b) relevant clause, table, and/or f

30、igure number;(c) wording of the proposed change; and(d) rationale for the change. 2015 CSA GroupCode for digester gas, landfill gas, andbiogas generation and utilizationAugust 2015 1ANSI/CSA B149.6-15Code for digester gas, landfill gas, and biogas generation and utilization1Scope1.1 General1.1.1This

31、 Code applies to the installation of systems for the production, handling, storage, and utilization of digester gas in newly constructed wastewater treatment plants, as well as additions to, and the upgrading of, existing systems.1.1.2This Code applies to the installation of systems for the producti

32、on, handling, and utilization of landfill gas in newly constructed landfill gas systems, as well as additions to, and the upgrading of, existing systems and temporary systems.1.1.3This Code applies to the installation of systems for the production, handling, storage, and utilization of biogas in new

33、ly constructed biogas systems.1.1.4This Code applies to piping systems in which the maximum operating pressures for piping used in digester systems, landfill gas systems, or biogas systems do not exceed 860 kPa for piping installed outdoors or 450 kPa for piping installed indoors.1.1.5This Code appl

34、ies to the safety aspects of the operation and maintenance for handling, storage, and utilization of digester gas in wastewater treatment plants and landfill gas at landfill sites or biogas in biogas systems.Note: This Code does not apply to substrate storage, long-term digestate storage, or pilot s

35、cale and research digesters in biogas systems.1.1.6This Code applies to existing digester gas and landfill gas systems where, in the opinion of the authority having jurisdiction, a hazard or potential hazard exists.1.1.7Within the scope of Clauses 1.1.1 to 1.1.5, there may be provisions not covered

36、in this Code, in which case the applicable provisions of the authority having jurisdiction are to apply.1.1.8Renewable natural gas is excluded from this Code.ANSI/CSA B149.6-15 2015 CSA Group2 August 20151.2 Scope of each Clause of this Code1.2.1 GeneralEach Clause of this Code shall be used with ot

37、her applicable Clauses.1.2.2 Clause 1 ScopeClause 1 contains the scope of this Code.1.2.3 Clause 2 Reference publicationsClause 2 contains the reference publications used in this Code.1.2.4 Clause 3 Definitions and abbreviationsThroughout this Code certain words appear in bold italic type. These are

38、 the words which for the purpose of this Code have been defined to ensure understanding of their intended meaning.1.2.5 Clause 4 General requirements for digester gas systemsClause 4 contains general requirements for appliances, accessories, components, and equipment, quality of work, personnel qual

39、ifications, control of sources of ignition, compliance with other codes, and prohibited practices.1.2.6 Clause 5 Installation requirements for appliances and equipment on digester gas systemsClause 5 contains basic requirements pertaining to the installation of appliances and equipment with respect

40、to their suitability for use, connections, clearances, accessibility, etc.1.2.7 Clause 6 Installation requirements for specific types of appliances and equipment on digester gas systemsClause 6 contains minimum requirements for compressors, boilers, waste gas burners, stationary gas engines, and inc

41、inerators.1.2.8 Clause 7 Air for combustion, venting, and ventilation in digester gas systemsClause 7 contains minimum requirements for the air to be used for combustion, venting, and ventilation of appliances and equipment.1.2.9 Clause 8 Piping and tubing systems and fittings in digester gas system

42、sClause 8 contains minimum requirements for the material, size, pressure, location, practices, protection, purging, and identification of piping and tubing systems and fittings.1.2.10 Clause 9 Digesters and gas storage tanksClause 9 contains requirements for the tanks used in the generation and stor

43、age of digester gas.1.2.11 Clause 10 Building and building services for digester gas systemsClause 10 contains requirements for compressor rooms, boiler rooms, hazardous areas, and combustible gas detection equipment.1.2.12 Clause 11 Testing hazardous areas and digester gas systemsClause 11 contains

44、 requirements for testing digester tank roofs and piping systems. 2015 CSA GroupCode for digester gas, landfill gas, andbiogas generation and utilizationAugust 2015 31.2.13 Clause 12 Electrical requirements for digester gas systemsClause 12 contains requirements for the safety electrical circuits fo

45、r equipment utilizing digester gas.1.2.14 Clause 13 Operation and maintenance of digester gas systemsClause 13 contains requirements for the operation and maintenance procedures affecting the safety of digester systems.1.2.15 Clause 14 General requirements for landfill gas systemsClause 14 contains

46、general requirements for appliances, accessories, components, and equipment, quality of work, personnel qualifications, control of sources of ignition, compliance with other codes, and prohibited practices.1.2.16 Clause 15 Installation requirements for appliances and equipment on landfill gas system

47、sClause 15 contains basic requirements pertaining to the installation of appliances and equipment with respect to their suitability for use, connections, clearances, accessibility, etc.1.2.17 Clause 16 Installation requirements for specific types of appliances and equipment on landfill gas systemsCl

48、ause 16 contains minimum requirements for blowers, boilers, waste gas burners, stationary gas engines, and incinerators.1.2.18 Clause 17 Air for combustion, venting, and ventilation in landfill gas systemsClause 17 contains minimum requirements for the air to be used for combustion, venting, and ven

49、tilation of appliances and equipment.1.2.19 Clause 18 Piping and tubing systems and fittings in landfill gas systemsClause 18 contains minimum requirements for the material, size, pressure, location, practices, protection, purging, and identification of piping and tubing systems and fittings.1.2.20 Clause 19 Building and building services for landfill gas sy