Rules and Regulations for Boiler and Pressure Vessel Inspection (R.I.G.L

Total Page:16

File Type:pdf, Size:1020Kb

Rules and Regulations for Boiler and Pressure Vessel Inspection (R.I.G.L RULES AND REGULATIONS FOR BOILER AND PRESSURE VESSEL INSPECTION (R.I.G.L. - 28-25) Revised July 2011 RI Department of Labor & Training Division of Occupational Safety Boiler Inspection Unit 1511 Pontiac Avenue P.O. Box 20157 Cranston, RI 02920-0942 Office#:(401)462-8577 Fax#:(401)462-8576 TABLE OF CONTENTS PART I - DEFINITION OF TERMS . Pg 3 PART II-ADMINISTRATION: l. Minimum Construction Standards for Boilers & Pressure Vessels . Pg 9 2. Frequency of Inspections of Boilers and Pressure Vessels. Pg 10 3. Notification of Inspection. Pg 11 4. Examination For An Inspector's Certificate of Competency. Pg 11 5. Examination Fees. Pg l2 6. Certificate of Competency and Identification Card. Pg l2 7. Conflict of Interest. Pg l3 8. Inspection Reports To Be Submitted by Inspectors. Pg l3 9. Insurance Companies To Notify Chief Inspector of New, Cancelled Or Suspended Insurance On Boilers Or Pressure Vessels . Pg l4 l0. Authorized Inspectors To Notify Chief Inspector Of Unsafe Boilers Or Pressure Vessels . Pg l4 ll. Owner-User Inspection Agency. Pg l5 l2. Defective Conditions Disclosed At Time of External Inspection . Pg l6 l3. Owner Or User To Notify Chief Inspector Of Accident . Pg l6 l4. Inspection Certificate And Inspection Fees. Pg l6 l5. Validity Of Inspection Certificate. Pg 19 l6. Re-stamping Boilers and Pressure Vessels . Pg 19 l7. Penalty For Operation Of Unsafe Boilers Or Pressure Vessels . Pg 20 l8. Condemned Boilers And Pressure Boilers. Pg 20 l9. Reinstallation Of Boilers Or Pressure Vessels . Pg 20 20. Installation, Operation, Sale Or Offering For Sale Of Non- Standard Boilers Or Pressure Vessels. Pg 20 21. Installation Of Used Or Second-Hand Boilers Or Pressure Vessels Pg 20 22. Reinstalled Boilers Or Pressure Vessels . Pg 21 23. Working Pressure For Existing Installations . Pg 21 24. Repairs and Alterations To Boilers & Pressure Vessels . Pg 21 25. Repairs To Pressure Relief Valves . Pg 21 26. Riveted Patches . Pg 22 27. Requirements For New Installations . Pg 22 28. Application Of State Serial Numbers . Pg 23 29. Variations. Pg 23 30. Penalties . Pg 24 PART III - EXISTING INSTALLATION: SECTION I - POWER BOILERS EBO-l - Age Limit Of Existing Boilers . Pg 24 EBO-2 - Maximum Allowable Working Pressure For Standard Boilers . Pg 25 EBO-3 - Maximum Allowable Working Pressure For Nonstandard Boilers. Pg 25 EBO-4 - Cast Iron Headers And Mud Drums . Pg 26 EBO-5 - Pressure On Cast Iron Boilers . Pg 26 EBO-6 - Safety Valves . Pg 26 EBO-7 - Boiler Feeding . Pg 28 EBO-8 - Water Level Indicators. Pg 29 EBO-9 - Water Columns . Pg 30 EBO-l0- Gage Glass Connections. Pg 31 EBO-ll- Pressure Gages. Pg 32 EBO-l2- Stop Valves . Pg 33 EBO-l3- Blow-off Piping. Pg 33 EBO-l4- Repairs And Renewals Of Boiler Fittings And Appliances. Pg 34 EBO-l5- Conditions Not Covered By These Requirements. Pg 34 i TABLE OF CONTENTS PART III - EXISTING INSTALLATION: SECTION II - HEATING BOILERS EHB-l - Standard Boilers . Pg 35 EHB-2 - Nonstandard Riveted Boilers. Pg 35 EHB-3 - Nonstandard Welded Boilers . Pg 35 EHB-4 - Nonstandard Cast Iron Boilers . Pg 35 EHB-5 - Portable Water Heaters . Pg 35 EHB-6 - Safety Valves. Pg 35 EHB-6 – Table . .. Pg 36 EHB-7 - Safety Relief Valve Requirements For Hot Water Heating And Hot Water Supply Boilers . Pg 37 EHB-8 - Steam Gages. Pg 38 EHB-9 - Pressure Or Altitude Gages And Thermometers. Pg 39 EHB-l0- Water Gage Glasses . Pg 39 EHB-ll- Stop Valves. Pg 40 EHB-l2- Feed-water Connections. Pg 41 EHB-l3- Water Column And Water Level Control Pipes . Pg 42 EHB-l4- Return Pump. Pg 42 EHB-l5- Repairs And Renewals Of Fittings And Appliances. Pg 42 PART III - EXISTING INSTALLATION: SECTION III - PRESSURE VESSELS EPV-l - Maximum Allowable Working Pressure For Standard Pressure Vessels. Pg 42 EPV-2 - Maximum Allowable Working Pressure For Nonstandard Pressure Vessels, Except as Provided in EPV-3 . Pg 42 EPV-3 - Nonstandard Pressure Vessels - Use Of Other Formulas . Pg 44 EPV-4 - Inspection of Inaccessible Parts . Pg 44 EPV-5 - Overpressure Protection. Pg 44 EPV-6 - Repairs And Renewals Of Fittings And Appliances. Pg 44 PART IV - GENERAL REQUIREMENTS: GR-l - Inspection Of Boilers And Pressure Vessels . Pg 45 GR-2 - Preparation For Inspection . Pg 45 GR-3 - Boilers And Pressure Vessels Improperly Prepared For Inspection . Pg 46 GR-4 - Removal Of Covering to Permit Inspection . Pg 46 GR-5 - Lap Seam Crack . Pg 46 GR-6 - Pressure Test . Pg 46 GR-7 - Automatic Low Water Fuel Cutoff And/Or Water Feeding Device Pg 47 GR-8 - Pressure Reducing Valves . Pg 47 GR-9 - Boiler Blow-off Equipment . Pg 48 GR-l0 - Location Of Discharge Piping Outlets . Pg 48 GR-ll - Supports . Pg 48 GR-l2 - Boiler Door Latches . Pg 48 GR-l3 - Clearance. Pg 49 GR-l4 - Ladders and Runways . Pg 49 GR-l5 - Exit From Boiler Room. Pg 49 GR-l6 - Suggestions For Operations . Pg 49 GR-l7 - Air And Ventilation Requirements - Combustion Air Supply & Ventilation Of Boiler Room . Pg 49 GR-l8 - Gas Burners. Pg 50 GR-l9 - Conditions Not Covered By These Rules And Regulations. Pg 50 ii FOREWORD To protect the public against boiler and pressure vessel explosions, it is essential that comprehensive administrative rules and regulations are approved by the Code Commission for Occupational Safety & Health under the authority of Chapter 28-25 of the General Laws of Rhode Island. These recommended Administrative Boiler and Pressure Vessel Safety Rules and Regulations are intended to serve that purpose. On January 5,1989, the Code Commission approved the Rules and Regulations recommended by the Advisory Panel. These Rules shall take effect on February 1,1989. INTRODUCTION To promote uniform enforcement of boiler and pressure vessel laws, these rules and regulations are prepared to assist the Administrator, the Chief Inspector and Inspectors in the implementation, administration and interpretation of the boiler and pressure vessels safety act for the State of Rhode Island. The purpose of the act is to promote safety in the applications of boilers or pressure vessels by providing suitable requirements for construction, installation, inspection, maintenance, repair, alteration, operation, modification and replacement. It is the intent to provide such safety with the least possible burden upon the industries involved. It is not presumed to limit in any way the designer's or the manufacturer's right to choose any design or method of construction that conforms to the requirements of the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code. In some instances, due to a valid impediment to full ASME Code compliance, a boiler or pressure vessel cannot be constructed to that Code. Provision is made for the owner or user to apply to the Chief Inspector for permission to use such boiler or pressure vessel within the jurisdiction. When a boiler and pressure vessel inspection law is enacted in a jurisdiction, the enforcement authority may be confronted with the problem of so administering the law and the rules and regulations that they will not create undue hardship, particularly in localities where numerous small installations are encountered. It is the purpose of any boiler and pressure vessel inspection law and the rules and regulations based 1 thereon to provide for and maintain safe operating conditions, but is definitely not the intent that they should prevent the operation of any equipment that can be shown to be reasonably safe. With these considerations in view, the following rules for existing installations are presented to form the basis of an efficient, uniform and workable safety division. Provision is also made for any person who believes any rule or regulation promulgated by the Code Commission is unreasonable, or that it imposes an undue burden upon the owner or user, to apply to the Administrator for a variation from such rule or regulation. 2 PART I DEFINITION OF TERMS l. ACT - The Boiler and Pressure Vessel Safety Act which was enacted as Chapter 28-25, Acts of the General Assembly. 2. ADMINISTRATOR - The Administrator of the Division of Occupational Safety is appointed by the Director of Labor and is responsible for implementation and enforcement of all provisions under Chapter 28-20. 3. ALTERATION - A change in any item described on the original Manufacturer's Data Report which affects the pressure capability of the boiler or pressure vessel. Non-physical changes such as an increase in the maximum allowable working pressure (internal or external) or design temperature of a boiler or pressure vessel shall be considered an alteration. A reduction in minimum temperature such that additional mechanical tests are required shall also be considered an alteration. 4. API-ASME CODE - The American Petroleum Institute (API) in conjunction with the ASME Code as used in these rules and regulations shall mean the Code for unfired pressure vessels for petroleum liquids and gases. 5. APPROVED - Approved by the Code Commission for Occupational Safety and Health. 6. ASME - The American Society of Mechanical Engineers (ASME), 345 E. 47th Street, New York, New York l00l7. 7. AUTHORIZED INSPECTION AGENCY - One of the following: (a) a department or division established by a jurisdiction which has adopted and does administer one or more sections of the ASME Code, one of which shall be Section I as a legal requirement, and whose inspectors hold valid commissions issued by The National Board of Boiler and Pressure Vessel Inspectors; (b) an insurance company which has been licensed or registered by the appropriate authority of a State of the United States or a Province of Canada to write and does write boiler and pressure vessel insurance and to provide inspection service of boilers and pressure vessels in such State or Province.
Recommended publications
  • 12.1 12. Pressure Vessels: Combined Stresses Cylindrical Or Spherical
    12. Pressure Vessels: Combined Stresses Cylindrical or spherical pressure vessels (e.g., hydraulic cylinders, gun barrels, pipes, boilers and tanks) are commonly used in industry to carry both liquid s and gases under pressure. When the pressure vessel is exposed to this pressure, the material comprising the vessel is subjected to pressure loading, and hence stresses, from all directions. The normal stresses resulting from this pressure are functions of the radius of the element under consideration, the shape of the pressure vessel (i.e., open ended cylinder, closed end cylinder, or sphere) as well as the applied pressure. Two types of analysis are commonly applied to pressure vessels. The most common method is based on a simple mechanics approach and is applicable to “thin wall” pressure vessels which by definition have a ratio of inner radius, r, to wall thickness, t, of r/t≥10. The second method is based on elasticity solution and is always applicable regardless of the r/t ratio and can be referred to as the solution for “thick wall” pressure vessels. Both types of analysis are discussed here, although for most engineering applications, the thin wall pressure vessel can be used. Thin-Walled Pressure Vessels Several assumptions are made in this method. 1) Plane sections remain plane 2) r/t ≥ 10 with t being uniform and constant 3) The applied pressure, p, is the gage pressure (note that p is the difference between the absolute pressure and the atmospheric pressure) 4) Material is linear-elastic, isotropic and homogeneous. 5) Stress distributions throughout the wall thickness will not vary 6) Element of interest is remote from the end of the cylinder and other geometric discontinuities.
    [Show full text]
  • Boiler & Furnace Combustion Imaging
    IMPAC Non-Contact Infrared Temperature Sensors IMPACApplication Non-Contact Note Infrared Temperature Sensors BOILER & FURNACE COMBUSTION IMAGING The Opportunity The continued rise of worldwide electricity consumption has put an ever increasing demand on power generation facilities. With coal fired power plants, this demand results in challenges to increase production while minimizing environmental impact. Optimizing the performance of the downtime. In addition, lance systems coal boiler can provide immediate typically operate blindly; attempting benefits and maximize the Rankine to uniformly target all boiler tubes for cycle efficiency. One common problem cleaning. It is possible to reduce the is the buildup of fly ash and soot furnace power to obtain a visual inspec- on the boiler tube surfaces which tion of some tubes, but the efficiency reduces the heat exchange efficiency. loss during this process is significant. These deposits (Slag) can be removed Properly tuning the combustion process with lances, and similar systems, but can help reduce the buildup of tube identifying when to implement this deposits, and can minimize emissions. action can be difficult to estimate and However, switching coal composition routine periodic lance operation can can further complicate the tuning cause thermal stress to boiler tubes, process, and lead to varying fouling of leading to failure and unscheduled the boiler tubes. Our Solution Advanced Energy leverages more than 25 years of infrared thermal imaging experience to developing the BoilerSpection™ SD solutions specifically designed to address the monitoring of heat exchange tubes in coal fired boilers and furnaces. Using a custom narrowband 3.9μm filter and precision boroscope optics, we view through boiler flames and provide the clearest image of boiler tubes available.
    [Show full text]
  • Consider Installing a Condensing Economizer, Energy Tips
    ADVANCED MANUFACTURING OFFICE Energy Tips: STEAM Steam Tip Sheet #26A Consider Installing a Condensing Economizer Suggested Actions The key to a successful waste heat recovery project is optimizing the use of the recovered energy. By installing a condensing economizer, companies can im- ■■ Determine your boiler capacity, prove overall heat recovery and steam system efficiency by up to 10%. Many average steam production, boiler applications can benefit from this additional heat recovery, such as district combustion efficiency, stack gas heating systems, wallboard production facilities, greenhouses, food processing temperature, annual hours of plants, pulp and paper mills, textile plants, and hospitals. Condensing economiz- operation, and annual fuel ers require site-specific engineering and design, and a thorough understanding of consumption. the effect they will have on the existing steam system and water chemistry. ■■ Identify in-plant uses for heated Use this tip sheet and its companion, Considerations When Selecting a water, such as boiler makeup Condensing Economizer, to learn about these efficiency improvements. water heating, preheating, or A conventional feedwater economizer reduces steam boiler fuel requirements domestic hot water or process by transferring heat from the flue gas to the boiler feedwater. For natural gas-fired water heating requirements. boilers, the lowest temperature to which flue gas can be cooled is about 250°F ■■ Determine the thermal to prevent condensation and possible stack or stack liner corrosion. requirements that can be met The condensing economizer improves waste heat recovery by cooling the flue through installation of a gas below its dew point, which is about 135°F for products of combustion of condensing economizer.
    [Show full text]
  • Coalescing Filters - to 175 Psig @ -20 to 200°F Series R20- Enameled Carbon Steel ◊ Series R22- 304 Stainless • Intake Air Flows to 40,000 SCFM Std
    click here to return to website Coalescing Filters - to 175 psig @ -20 to 200°F Series R20- Enameled Carbon Steel ◊ Series R22- 304 Stainless • Intake Air Flows to 40,000 SCFM Std. • ASME U Stamp Std., Nat’l. Board Registered • Exceptionally Low ∆P, High Flow • Pleated Element Design - Exceptional Useful Filter Area • Hinged Swing Bolt Closure, Easy Access, O Ring Seal • 304SS Throat Safety Cages and ∆P Taps Std. • Rugged Enameled Steel or 304SS Construction Series R20 coalescing filters are fabricated from rugged enameled carbon steel, designed, constructed in accordance w/ASME Boiler & Pressure Vessel Code requirements for unfired pressure vessels. Any model can be modified to fit your needs. • Standard Connection Sizes from 1" to 12" NPT or raised face flange in-line connections are std. Alt. connections and/or an elevated discharge are avail- able. A hinged swing bolt closure is standard on models R20-0002 & larger. • Coalescing Filter Media. Sparks™ #907 media is composed of microfine borosilicate glass fibers bonded with phenolic resin. Together with a textile prefilter and a final drain layer, these pleated elements are remarkably effective at coalescing fine entrained oil and aqueous vapor mist from air/gas flows with very low ∆P. Experience has demonstrated high removal (over 90%) in dealing with 1.0 to 0.3µ aerosols. Other optional filter media such as #926 exceeds 95% removals. Individual performance will vary with the specific viscosity and vapor pressure of liquid con- taminates. • Options: Models R20-0202-RF-030 and larger include CS leg supports. (add 18" to OH) Carbon steel support legs in any length, gauges, and special finishes, are optional on any model.
    [Show full text]
  • Modu-Fire® Forced Draft Gas-Fired Boiler 2500 - 3000
    MODU-FIRE® FD 2500-3000 Rev. 1.1 (11/21/11) MODU-FIRE® FORCED DRAFT GAS-FIRED BOILER 2500 - 3000 C.S.A. Design-Certified Complies with ANSI Z21.13/CSA 4.9 Gas-Fired Low Pressure Steam and Hot Water Boilers ASME Code, Section IV Certified by Harsco Industrial, Patterson-Kelley C.S.A. Design-Certified Complies with ANSI Z21.13/CSA 4.9 Gas-Fired Low Pressure Steam and Hot Water Boilers Model #:_______ Serial #______________________ Start-Up Date: _______________________ Harsco Industrial, Patterson-Kelley 100 Burson Street East Stroudsburg, PA 18301 Telephone: (877) 728-5351 Facsimile: (570) 476-7247 www.harscopk.com ©2010 Harsco Industrial, Patterson Kelley Printed : 6/27/2012 MODU-FIRE® Forced Draft Boiler 1 INTRODUCTION ...................................................................................................... 4 2 SAFETY .................................................................................................................... 4 2.1 General ............................................................................................................................ 4 2.2 Training ............................................................................................................................ 4 2.3 Safety Features ................................................................................................................ 5 2.4 Safety Labels ................................................................................................................... 5 2.5 Safety Precautions ..........................................................................................................
    [Show full text]
  • Comparing Exchangers for Boiler Water/High Temperature Indirect Water Heaters HUBBELL Case Study 1
    HUBBELLHEATERS.COM Comparing Exchangers for Boiler Water/High Temperature Indirect Water Heaters HUBBELL Case Study 1 There are a few different options available if you are looking for a hydronic water heater that uses boiler water or high temperature hot water to heat potable water. One of the biggest decisions regarding boiler water heater types is determining which heat exchanger the system should utilize. Some models use a tube bundle heat exchanger while others use a plate and frame or brazed plate system. Tube bundle heat exchangers and plate and frame/brazed plate systems vary greatly in the way that they heat water and maintain a certain temperature. Both produce hot water, but in different ways. Hubbell offers a wide range of hydronic water heating systems for water to water applications, which can be customized to meet your needs. Let’s take a look at the heat exchangers for hydronic water heaters that should be considered by end users. Tube Bundle Tube bundles are designed to transfer heat from a, boiler water, solar water or high temperature hot water (HTHW) system to the domestic potable hot water system. The primary heat source, in this case boiler water or HTHW, travels through the tubing in the bundle within the shell, and transfers heat to the secondary system (potable water) without allowing either liquid to come into direct contact with the other. Tube bundle heat exchangers are ideal for older non-condensing water heating systems, specifically ones that use oil to produce heat. Older boilers are more suitable for the tube bundle type heat exchanger as they deal with higher non-condensing water temperatures.
    [Show full text]
  • Design of Pressure Vessle (Air Bottle)
    INTERNATIONAL JOURNAL FOR RESEARCH IN EMERGING SCIENCE AND TECHNOLOGY, VOLUME-4, ISSUE-1, JAN-2017 E-ISSN: 2349-7610 Design of Pressure Vessle (Air Bottle) N.V.Mahesh Babu.T1, Nersu Radhika2, Dr.P.Srinivasa Rao3 and Dr.B.Sudheer Prem Kumar4 1Associate Professor, Department of Mechanical Engineering, Guru Nanak Institutions Technical Campus, Ibrahimpatnam, Telangana 501 506, [email protected]. 2Assistant Professor, H & S Department, Sri Indu College of Engineering and Technology, Ibrahimpatnam, Telangana 501 506. 2 [email protected]. 3 Professor, Department of Mechanical Engineering,Al-Habeeb College of Engineering and Technology,Chevella, Telangana, [email protected] 4Professor & Chairman(Board of Studies) Mechanical Engineering, JNT University,Hyderabad, Telangana 500 085, [email protected], [email protected] ABSTRACT This is a paper that presents the design of a pressure vessel (Air Bottle). High pressure rise is developed in the pressure vessel and pressure vessel has to withstand severe forces. In the design of pressure vessel safety is the primary consideration, due the potential impact of possible accident. There have a few main factors to design the safe pressure vessel. This writing is focusing on analyzing the safety parameter for allowable working pressure. The cylinder is designed by considering the pressure, temperature and other constraints. Analysis of strength is made analytically and validation is done by ANSYS model and analysis. Keywords — Air bottle, ASME Code, Finite Element Analysis, ANSYS, Design for Fatigue. 1. INTRODUCTION 2. TYPE OF STRESS INDUCED IN VESSELS Pressure vessels are containers for containment of pressure, Generally there are two types of stresses induced.
    [Show full text]
  • Boiler & Cooling Tower Control Basics
    Boiler & Cooling Tower Control Basics By James McDonald, PE, CWT Originally Published: CSTR – May 2006 For those of us who have been around boilers and cooling towers for years now, it can be easy to forget how we may have struggled when we first learned about controlling the chemistry of boilers and cooling towers. After running all the chemical tests, where do you start when the phosphate is too high, conductivity too low, sulfite nonexistent, and molybdate off the charts? Even better, how would you explain this decision process to a new operator? Cycles of Concentration The first place you always start is cycles of concentration (cycles). You may measure cycles by measuring conductivity or chlorides. If everything else is running normally, when the cycles are too high, everything else should be proportionally too high. When the cycles are too low, everything else should be proportionally too low. When the cycles are brought back under control, the other parameters should come back within range too. Example We wish to run a boiler at 2,000 µmhos, 45 ppm phosphate, and 40 ppm sulfite; however, the latest tests show 1,300 µmhos, 29 ppm phosphate, and 26 ppm sulfite. The conductivity is 35% lower than what it should be. Doing the math ((45- 29)/45=35%), we see that the phosphate and sulfite are also 35% too low. By reducing boiler blowdown and bringing the conductivity back within control, the phosphate and sulfite should be within their control range too. Boilers 100 Beyond Cycles Whether we’re talking about boilers or cooling towers, we know if we reduce blowdown, cycles will increase, and if we increase blowdown, cycles will decrease.
    [Show full text]
  • An Overview of the State of Microgeneration Technologies in the UK
    An overview of the state of microgeneration technologies in the UK Nick Kelly Energy Systems Research Unit Mechanical Engineering University of Strathclyde Glasgow Drivers for Deployment • the UK is a signatory to the Kyoto protocol committing the country to 12.5% cuts in GHG emissions • EU 20-20-20 – reduction in EU greenhouse gas emissions of at least 20% below 1990 levels; 20% of all energy consumption to come from renewable resources; 20% reduction in primary energy use compared with projected levels, to be achieved by improving energy efficiency. • UK Climate Change Act 2008 – self-imposed target “to ensure that the net UK carbon account for the year 2050 is at least 80% lower than the 1990 baseline.” – 5-year ‘carbon budgets’ and caps, carbon trading scheme, renewable transport fuel obligation • Energy Act 2008 – enabling legislation for CCS investment, smart metering, offshore transmission, renewables obligation extended to 2037, renewable heat incentive, feed-in-tariff • Energy Act 2010 – further CCS legislation • plus more legislation in the pipeline .. Where we are in 2010 • in the UK there is very significant growth in large-scale renewable generation – 8GW of capacity in 2009 (up 18% from 2008) – Scotland 31% of electricity from renewable sources 2010 • Microgeneration lags far behind – 120,000 solar thermal installations [600 GWh production] – 25,000 PV installations [26.5 Mwe capacity] – 28 MWe capacity of CHP (<100kWe) – 14,000 SWECS installations 28.7 MWe capacity of small wind systems – 8000 GSHP systems Enabling Microgeneration
    [Show full text]
  • Why Does the Wisconsin Boiler and Pressure Vessel Code, 636 41
    Why does the Wisconsin Boiler and Pressure Vessel Code, SPS 341, regulate air compressors? By Industry Services Division Boiler and Pressure Vessels Program Almost everyone forms a definite picture in their mind when they hear the term “air compressor.” They probably think of a steel tank of some shape and dimension, with an electric motor, and an air pump mounted on top of the tank. To better understand the requirements of the Wisconsin Boiler Code, SPS 341, pertaining to air compressors, we need to have some common terminology. If a person wanted to purchase an “air compressor” at a hardware or home supply store, they would certainly be offered the equipment described above, consisting of three separate mechanical devices; the motor, the pump, and the storage tank. First, there is an electric motor, used to provide power to the device that pumps air to high pressure. This pumping device is the only part of the unit that is properly called an "air compressor." The compressor delivers high-pressure air to the third and final part of the mechanical assembly, the air storage tank; commonly called a pressure vessel. Because the pressure vessel receives pressurized air, this is the only part of the device described above that is regulated SPS 341. SPS 341 regulates pressure vessels when the pressure vessel's volume capacity is 90 gallons (12 cubic feet) or larger, and the air pressure is 15 pounds per square inch or higher. A typical pressure vessel of this size would be 24 inches in diameter and 48 inches long. In industrial settings, it is common practice to mount very large air compressors in a separate location from the pressure vessels.
    [Show full text]
  • Use Feedwater Economizers for Waste Heat Recovery, Energy Tips
    ADVANCED MANUFACTURING PROGRAM Energy Tips: STEAM Steam Tip Sheet #3 Use Feedwater Economizers for Waste Heat Recovery Suggested Actions ■■ Determine the stack temperature A feedwater economizer reduces steam boiler fuel requirements by transferring after the boiler has been tuned heat from the flue gas to incoming feedwater. Boiler flue gases are often to manufacturer’s specifications. rejected to the stack at temperatures more than 100°F to 150°F higher than The boiler should be operating the temperature of the generated steam. Generally, boiler efficiency can at close-to-optimum excess be increased by 1% for every 40°F reduction in flue gas temperature. By air levels with all heat transfer recovering waste heat, an economizer can often reduce fuel requirements by 5% surfaces clean. to 10% and pay for itself in less than 2 years. The table provides examples of ■■ Determine the minimum the potential for heat recovery. temperature to which stack gases Recoverable Heat from Boiler Flue Gases can be cooled subject to criteria such as dew point, cold-end Recoverable Heat, MMBtu/hr corrosion, and economic heat Initial Stack Gas transfer surface. (See Exhaust Temperature, °F Boiler Thermal Output, MMBtu/hr Gas Temperature Limits.) 25 50 100 200 ■■ Study the cost-effectiveness of installing a feedwater economizer 400 1.3 2.6 5.3 10.6 or air preheater in your boiler. 500 2.3 4.6 9.2 18.4 600 3.3 6.5 13.0 26.1 Based on natural gas fuel, 15% excess air, and a final stack temperature of 250˚F. Example An 80% efficient boiler generates 45,000 pounds per hour (lb/hr) of 150-pounds-per-square-inch-gauge (psig) steam by burning natural gas.
    [Show full text]
  • Seton Wood Boilers Installation and Operation Instructions for W-90E
    Seton Wood Boilers There is no substitute for doing it right. SETON WOOD BURNING PRODUCTS 406-295-9902 24 RIVERVIEW DR. TROY MT 59935 Installation and Operation Instructions for W-90E W-130E W-180E Because of the very high efficiency of the Seton boiler the flue gas exhaust temperatures can be low enough to cause condensation in the chimney. This condensation may, over time, damage a masonry chimney. If you have condensation in your chimney, a insulated stainless steel chimney liner should be installed inside the flue SAFETY INSTRUCTIONS Safety Notice: If this is not properly installed, a house/building fire may result. For your safety, contact local building or fire officials about permits, restrictions, and installation requirements for your area. NEVER BLOCK DRAFT IN OPEN POSITION NEVER OPERATE WITH THE FEED DOOR OPEN!! THE SETON BOILER MUST BE INSTALLED IN A ENCLOSED, INSULATED ROOM. IT SHOULD BE REMOTE FROM THE LIVING SPACE. PLUMB BOTH RELIEF VALVES TO A SAFE LOCATION PIPE MUST RUN DOWN HILL ITS FULL LENGTH. PLUMB TO AN OUTSIDE AREA., DO NOT ALLOW THE PIPE TO EXTEND OUTSIDE FAR ENOUGH TO FREEZE. O NOT REDUCE THE PIPE SIZE. DO NOT PUT THREADS ON THE OPEN END OF THE DRAIN PIPE DO NOT JOIN THE TWO DRAINS TOGETHER WARNING!! ATOMIZED POLYPROPYLENE GLYCOL AT HIGH TEMPERATURES CAN CAUSE AN EXPLOSION!! Do not open the feed door until the wood has burned down some. Avoid trying to see how the fire is burning shortly after you fill it. All wood burning appliances will smoke if you open the feed door when it is full of wood.
    [Show full text]