Hebei Haihao High Pressure Flange & Pipe Fitting Group Co.

  • The difference between coupling and union

    The difference between coupling and union

    The union is generally used for the front end and the back end of the pipeline with valves, water meters and other equipment, to facilitate the disassembly and maintenance of these equipment, the middle is to rely on the clamping tight sealing pad to seal. ...
  • What are outlet pipe fittings?

    What are outlet pipe fittings?

    Outlet pipe fitting(also called pipe branch fittings,branch connection fittings,tube base or O’lets) is the connection of a large-diameter branch to a small-diameter pipe.The pipe on which the outlet is welded is called the run pipe,and the pipe weld ...
  • Comparison of sweepolet and weldolet

    Comparison of sweepolet and weldolet

    First, when we talking about the sweepolets, will think of the tees. Under certain circumstances, the advantages of the sweepolets compared to the tee are as follows: 1. Sweepolet saddle can overcome the defeats in the process of making tee without weak po ...
  • Why seamless steel pipe can not be produced by casting method

    Why seamless steel pipe can not be produced by casting method

    Seamless steel pipe has hollow section, which is widely used as pipeline for fluid transportation, such as pipeline for oil, natural gas, gas, water and some solid materials. Compared with solid steel such as round steel, steel pipe has the same bending an ...
  • Manufacturing method of marine seamless steel pipe

    Manufacturing method of marine seamless steel pipe

    Marine seamless steel pipes can be divided into hot-rolled pipes,cold-rolled pipes,cold-drawn pipes and extruded pipes according to different production methods.(Seamless steel pipes manufacturing process) 1. Hot-rolled stainless steel seamless pipes are g ...
  • What is the mean of FPSO (Floating Production Storage and Offloading)

    What is the mean of FPSO (Floating Production Storage and Offloading)

    FPSO is an acronym for Floating Production Storage and Offloading. FPSO (Floating Production Storage and Offloading) is a floating vessel located near an offshore oil field, usually based on (converted) a oil tanker hull. It is equipped with hydrocarbon pr ...
  • Seamless steel pipes manufacturing process

    Seamless steel pipes manufacturing process

    Haihao Group manufacture & supply seamless steel pipes in different dimensions,materials,standards.The seamless steel pipes mean the steel pipes without seams on its surface.The following are the types of seamless steel pipes manufacturing process: Man ...
  • What are the differences between socket welding and butt welding pipe fittings

    What are the differences between socket welding and butt welding pipe fittings

    There are various ways for pipes,fittings,flanges and valves to connect,socket welding and butt welding are the two popular.However,you might be confused about what are the differences between socket welding and butt welding pipe fittings,and which one wou ...
  • Introduction of ASME B16.11 socket welding fittings

    Introduction of ASME B16.11 socket welding fittings

    What are ASME B16.11 socket welding fittings? Socket welding is a pipe connection in which pipes are inserted into the wall of a valve,fitting or flange and welded.In contrast to butt welding,socket welding is usually used for small diameter pipes of 2 inc ...
  • What are galvanized steel pipes?

    What are galvanized steel pipes?

    Galvanized steel pipe can increase the service life of steel pipe and prevent rust to a certain extent.This paper will introduce the classification and main application of galvanized pipes. One kind of galvanized pipe is hot-dip galvanized pipe.The molten ...
  • Introduction of submerged arc welding

    Introduction of submerged arc welding

    Submerged arc welding(SAW) is a method in which the arc is burned under the flux layer to weld.In the welding process,the arc is covered by flux,and the wire feeding and arc movement are automatically controlled by a mechanical device.The process is normal ...
  • Advantages and disadvantages of electric resistance welding

    Advantages and disadvantages of electric resistance welding

    Electric resistance welding refers to the method of using the resistance heat generated by the current passing through the welding part and the contact place as the heat source to heat up the part locally and pressurize the welding at the same time. API 5L ...
  • What is ASTM A105 carbon steel material?

    What is ASTM A105 carbon steel material?

    A105 is American ASTM standard number,”A” stands for common carbon structural steel.ASTM A105 is the most common carbon steel material under ASME/ANSI/API/MSS standard.It’s standard specification for carbon steel forgings for piping appli ...
  • Forming process of large size pushing elbows

    Forming process of large size pushing elbows

  • The function of anticorrosive coating for pipeline products

    The function of anticorrosive coating for pipeline products

  • Causes of pipeline corrosion

    Causes of pipeline corrosion

  • What is sandblasting and its application

    What is sandblasting and its application

  • Introduction of plug

    Introduction of plug

  • Notes before purchase large diameter seamless pipe

    Notes before purchase large diameter seamless pipe

  • The difference between welded steel pipe and seamless steel pipe

    The difference between welded steel pipe and seamless steel pipe