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Domestic hot water and heating series: gas hot water boiler, vacuum hot water boiler, vertical atmospheric pressure hot water boiler, electric hot water boiler Factory use, high temperature steam: wns fuel gas steam boiler, szs water tube steam boiler, vertical steam boiler, electric steam boiler

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FANGKUAI is founded in 1998, which is a clean fuel boiler enterprise integrating R&D, manufacturing, sales and service. In the past 20 years of development and innovation, the company has grown into a global enterprise, and its products have been exported to more than 80 countries including Russia, Mongolia and Thailand, and have established long-lasting cooperative relations with local enterprises!

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Causes of low pressure boiler tubes diameter larger

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Popular products


θrion Gas Fired Steam Boiler


Rated thermal efficiency: 100-104%

Fixed working pressure: ≤1.6MPa

Applicable fuel:natural gas etc.


Gas(oil) Fired Integrated Hot Water Boiler


Rated thermal efficiency:96-98%

Fixed working pressure:≤1.25MPa

Applicable fuel:Natural gas, light oil, etc.


H6 Gas Fired Hot Water Boiler


Rated thermal efficiency: 97.2-106%

Fixed working pressure:0.1MPa

Applicable fuel:Natural gas, etc.


T7 Vacuum Hot Water Boilerr


Rated thermal efficiency:≥105.5%

Fixed working pressure:-0.02MPa

Applicable fuel:Natural gas, etc.


V6 Gas Fired Hot Water Boiler


Rated thermal efficiency:97.2-104.4%

Fixed working pressure:1.0MPa

Applicable fuel:Natural gas, etc.


Electric Steam Boiler

Capacity:0.5-4.0 t/h

Rated thermal efficiency:98%

Fixed working pressure:≤1.25MPa

Applicable fuel:electric energy


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  • An introduction to steam generation and distribution

    and a single large diameter convective pass mounted inside a cylindrical iron pres-sure vessel. Trevithick's boilers of this type typically operated at pressures in the range between 1.4 and 3.5 barg. Whilst efficiencydata are difficultto find for these early high pressure boilers, that they were significantlymore efficientis known. RoltGet Price

  • Lancashire Boiler: Working. Parts, Advantages, Applications

    Lancashire Boiler-. Lancashire Boiler is a low pressure, internally fired, stationary fire tube boiler with natural circulation with a maximum pressure range of 16bar. The steam production rate of this boiler is 9000kg/hr and efficiency is 50% to 70%. Here the working principle of the Lancashire boiler is heat exchange.Get Price

  • Water Tube Boilers | Spirax Sarco

    Water-tube boilers differ from shell type boilers in that the water is circulated inside the tubes, with the heat source surrounding them. Referring back to the equation for hoop stress (Equation 3.2.1), it is easy to see that because the tube diameter is significantly smaller, much higher pressures can be tolerated for the same stress.Get Price

  • Boilers

    Water-Tube Boiler (1867) A water-tube boiler is one in which the products of combustion pass around the outside and heat tubes containing the water. The water tube diameter is much smaller than the shell diameter of a fire-tube boiler, so much higher pressures can be obtained, well over 2000 psi. The furnace and boiler tube area must beGet Price

  • What Causes Low Boiler Pressure? Find out & Fix | Boiler …

    Water Handbook - Boiler System Failures | SUEZGet Price

  • Reliability of Supercritical Boiler and its Advantages

    For sliding pressure operation boilers, maintaining uniform fluid conditions at low load / low pressure operation becomes critical to reduce the potential of tube damage caused by high metal temperatures. In Hitachi's Benson boiler, the lower part of the furnace waterwallsGet Price

  • USCG License Questions Steam (old) Part 2 - Quizlet

    Which of the following statements represents the advantage of using a small diameter boiler tube over a larger diameter tube? (A.) Small diameter tubes result in lower outside tube metal temperatures. (B.) Small diameter tubes reduce the heating surface area. (C.) Small diameter tubes are less affected by the insulating properties of soot. (D.)Get Price

  • An Engineering Guide to Modern Fuel Systems

    tion pressure of over 3 psig can cause the failure of the pumps seals. This high pressure can be caused by a fuel transfer pump or the static head caused by an elevated (relative to boiler pump) supply system. Low Suction Pressure Limit – 15‖Hg High Suction Pressure Limit – 3 psigGet Price

  • High Pressure Boiler: What is it? Types & Characteristics

    The division of megapascal pressure (MPa) determines whether a boiler is low and high pressure. Boilers that produce pressure above 80 MPa are considered to be high pressure. Low pressure boilers have a MPa below 80 MPa. Water circulation can be forced or natural. If the water is pumped, it is forced. If it is natural, it is by convection.Get Price

  • Boiler Water Conductivity Measurement Fundamentals

    Feb 24, 2016 · Boiler water analysis and control for correct boiler operation There are several causes for whilst foaming; high levels of suspended solids, high alkalinity or contamination by oils and fats but, the most common cause of carryover (provided these other factors are properly controlled) is a high Total Dissolved Solids (TDS) level.Get Price

  • Boiler – Fundamentals and Best Practices

    Large water tube boilers are field erected and may be unique design Fire Tube Boilers. WATER WALLS SUPERHEATER SCREEN TUBES STEAM DRUM MUD DRUM ECONOMISER Water tube boiler Multiple drum system low pressure (LP) medium pressure (MP) high pressure (HP) Multi Pressure Boiler System with Integral Deaerator.Get Price

  • Part 1 - National Board of Boiler and Pressure Vessel

    The only thing that allows a boiler to withstand these furnace temperatures is the presence of water in all tubes of the furnace at all times that a fire is present. Low-water conditions will literally melt steel boiler tubes with the result closely resembling a …Get Price

  • 2. BOILERS

    2. BOILERS Bureau of Energy Efficiency 27 Syllabus Boilers: Types, Combustion in boilers, Performances evaluation, Analysis of losses, Feed water treatment, Blow down, Energy conservation opportunities. 2.1 Introduction A boiler is an enclosed vessel that provides a means for combustion heat to be transferred into water until it becomes heated water or steam.Get Price

  • Boiler Safety - Home | Occupational Safety and Health

    Minerals can cause a build up of deposits and cause overheating of boiler parts. 7-Corrosion. is the rusting or pitting of boiler metal. Corrosion weakens boiler metal by the thinning (removal) of the metal. Corrosion causes pitting and channeling of the metal, which results in the thinning of tubes, piping, and other boiler components.Get Price

  • Boiler Efficiency and Steam Quality: The Challenge of

    The size of the bubbles is directly related to steam pressure. Low-pressure operation requires a larger volume of steam to carry the required heat energy. This low-pressure operation produces more and larger steam bubbles and creates greater turbulence on the water surface. Eventually, the loss of boiler water can cause the low-water level Get Price

  • How to distinguish hot rolling and cold rolling seamless tube?

    Hot rolled seamless steel pipe is generally divided into low, medium, high pressure boiler steel pipe, alloy steel pipe, stainless steel pipe, oil cracking pipe, geological steel pipe and other steel pipe. The outside diameter of hot rolled seamless tube is generally greater than 32mm and the wall thickness of that is 2.5-75mm. DifferenceGet Price

  • Reasons why the water is bouncing in the gauge glass, and

    Jun 25, 2014 · This is a common problem with oil burners and power gas burners. The flame has to be the right size and shape for the chamber. If it's not, it will overheat a part of the boiler and cause steam to form more quickly at that point. As the bubbles of steam race up one side of the boiler, the water on the other side of the boiler will drop to Get Price

  • (PDF) Steam Boiler - ResearchGate

    These boiler falls under the category of high pressure boiler. The steam generation rate in water tube boiler is high i.e. 450 tonne s per hour. For a given power the floor area required for the Get Price


    Jan 22, 2014 · Experimental results show that the degree of hardening empty pull low pressure boiler tubes metal, tensile strength, the amount of the expanded diameter hole and the outer mold pull low-pressure boiler tube outer diameter is proportional to the size of the increase and the amount of deformation, and head _ even Stubbs Road Stubbs Road attained unconnected …Get Price

  • Boiler Alarms And Trips | 5 Common Boiler Safety Devices

    Mar 01, 2018 · 7) Low feed-water pressure: Due to certain problems the feed-pump#1 is having a problem generating ample pressure to push the water inside the boiler drum, therefore stand-by feed-pump starts to maintain the pressure of feed-water. (Remember there is a feed check valve between feed-water pump and drum.)Get Price

  • Steam System Design and Best Practices Related to Kiln Drying

    Steam Boiler – high or low pressure Boiler Feed Water Tank – minimum Size of Main 'D' Collection Leg Diameter 1/2" to 6" 6" & larger Same dia. as main 'D' Keep coil fin and tube area as clean as possible Get Price

  • Water-tube Package and Industrial Boilers » Babcock & …

    Water-Tube Boiler (1867) A water-tube boiler is one in which the products of combustion pass around the outside and heat tubes containing the water. The water tube diameter is much smaller than the shell diameter of a fire-tube boiler, so much higher pressures can be obtained, well over 2000 psi. The furnace and boiler tube area must beGet Price

  • Boiler tubes, Boiler steel tubes, Boiler steel pipe

    internal deposit, low flow though the tube due to partial choking of the tube internal diameter, due to sudden load raise, due to sudden fuel input, etc.[6] Long term overheating failures can occur in tubes throughout the boiler. The following can be causes of this mechanism of failureGet Price

  • B&W Learning Center Articles » Babcock & Wilcox

    What Causes Low Boiler Pressure? Find out & Fix | Boiler GuideGet Price


    To study about low pressure boiler ( Lancashire Boiler ). INTRODUCTION It is a stationary, fire tube, internally fired, horizontal and natural circulation boiler. It is used where working pressure and power required are moderate. CONSTRUCTION: These boilers have a cylindrical shell of 1.75m to 2.75m diameter. Its length varies from 7.25m to 9m.Get Price

  • Boiler Tubes Overheating Failures and Actions to Control Them

    Sep 21, 2020 · Boiler tube refers to a steel with open ends and a hollow section, and its length is larger than that of the periphery. According to the production method, it can be divided into seamless steel pipe and welded steel pipe. Wall thickness means a wide range of dimensions, from capillary tubes with a small diameter to large-diameter tubes with a Get Price

  • Deciding When to Replace It - When is That Old Boiler Shot

    Mar 16, 2015 · Low-pressure boilers (with a maximum of 15 psig) typically are patched by welding new steel plates in place of damaged steel, but high-pressure boilers become unsafe once structurally damaged. If a low-pressure steel boiler has had parts other than tubes repaired, such as shell or tube sheets, it is reasonable to assume the boiler is near the Get Price

  • Boiler Corrosion - Causes,Effects and How to Prevent it

    Apr 29, 2020 · Overheating could be due to low water condition, heavy scale, oily deposits or forcing of the boiler. 3. Deformation of tube plate: Under pressure would have the overheating effect that tube fail at the tube end of the tube plate. Check procedure: For water tube boiler (Z boiler): 1. Stop the firing – open up the combustion chamber,Get Price

  • 420 Exit Exam - pubic Flashcards

    Water evaporated into the atmosphere air causes the air's density to: Term. The average low pressure water boiler is constructed for a maximum working pressure of _____ psig. Term. Shell and tube: Definition. A _____ heat exchanger is an external tube type heat exchanger that consists of a large pressure vessel with multiple tubes that Get Price


    Jan 07, 2016 · Does the pressure in your Combi boiler or heating system boiler keep dropping? Here's how to fix it! We'll show you why it happens, and how to fix it. We'll Get Price

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