Hebei Haihao Group

  • What is hot forging?

    What is hot forging?

    Hot forging entails the heating of a workpiece to about 75% of its melting temperature. This allows for the flow stress and energy required to form the metal to lower,effectively increasing the rate of production (or strain rate). Hot forging aids in makin ...
  • What is press forging?

    What is press forging?

    Press forging may be defined as the process of shaping a metal that is placed between two dies by applying mechanical pressure or hydraulic pressure. Press forging is usually done on a forge press – a machine that applies gradual pressure on the forg ...
  • Types of  forging process

    Types of forging process

    Forging is the most commonly used process for pipeline products.When forging,an initially simple part, the billet, is plastically deformed between the two dies to obtain the desired final shape.In order to better understand and optimize the forging process ...
  • The advantages and disadvantages of forging process

    The advantages and disadvantages of forging process

    Forging process provides uniformity of composition and structure. Forging lead to metallurgical recrystalisation and grain refinement due to thermal cycle and deformation process. This strengthens the resulting steel products, especially in terms of impact ...
  • Differences between forging and casting

    Differences between forging and casting

    Both forging and casting are metal-working processes commonly used in industry. They are often not restricted to metals.The main operations of the two processes are different.In the case of forging, when a metal is in a solid state, it is treated with comp ...
  • What is the casting process of pipeline products?

    What is the casting process of pipeline products?

    Forging and casting are the processes of forming metal components with complex shapes through the deformation of metal materials, but the methods are different.Casting is a process in which metal is heated until molten stage and pour this liquid metal into ...
  • What is the forging process of pipeline products?

    What is the forging process of pipeline products?

    Forging is the application of thermal and mechanical energy to steel billets or ingots to change the shape of the material when it is in a solid state.Steel forgings are usually made by a series of compression processes under extremely high pressure, with ...
  • Advantages and disadvantages of galvanized pipes applied to FPSO

    Advantages and disadvantages of galvanized pipes applied to FPSO

    Galvanized steel pipe is steel that has undergone chemical processing in order to make it corrosion resistant,it refers to steel pipe coated with zinc. This coating protects steel from corrosion and extends the life of FPSO ships. The advantages and disadv ...
  • Production method of seamless steel pipe applied to FPSO ships

    Production method of seamless steel pipe applied to FPSO ships

    According to different production methods,the seamless steel pipe applied in FPSO can be divided into hot rolled pipe,cold rolled pipe,cold drawn pipe and extruded pipe.Here is a detailed description of these methods: Hot rolling seamless pipe is generally ...
  • Classification of seamless steel pipes used in FPSO ships

    Classification of seamless steel pipes used in FPSO ships

    Steel pipes applied on FPSO ships can be divided into welded steel pipes and seamless steel pipes.The seamless steel pipes for FPSO(Floating Production Storage and Offloading) ships usage are mainly used for Level 1 & Level 2 pressure pipes in piping s ...
  • What is an FPSO(Floating Production Storage and Offloading)?

    What is an FPSO(Floating Production Storage and Offloading)?

    Haihao Group supply & manufacture seamless steel pipes,welded steel pipes,casing and tubing pipes,butt welding pipe fittings,forged pipe fittings and forged flanges in different dimensions, specifications, standards, materials.Our products are widely i ...
  • Classification of welded steel pipes used in FPSO ships

    Classification of welded steel pipes used in FPSO ships

    Steel pipes applied on FPSO ships can be divided into welded steel pipes and seamless steel pipes. Among them,there are mainly the following types of welded steel pipes: Spiral welded pipes in Haihao Group According to the different welding process,the wel ...
  • The differences between sockolet and weldolet

    The differences between sockolet and weldolet

    The sockolet and the weldolet both have a run end and a branch end.The run end is connected to the large diameter pipe,and the branch end is connected to the smaller diameter pipe.The sockolet and the weldolet are fillet welds connected to the run pipe.It ...
  • Types of outlet pipe fittings

    Types of outlet pipe fittings

    Outlet pipe fittings are also known as pipe branch fittings,branch connection fittings,tube base or O’lets.It provides a branch of a large-diameter pipe to a small-diameter pipe.Outlet is the reinforcing fitting mainly used branch pipe connection. Ty ...
  • What are the differences between threaded couplings and pipe nipples

    What are the differences between threaded couplings and pipe nipples

    Threaded couplings and pipe nipples are the commonly used forged pipe fittings,both are a short pipe with threads,but they are different.So what are the differences between threaded couplings and pipe nipples? ASME B16.11 A182 F304 Threaded Half Couplings ...
  • The manufacturing methods of seamless steel pipe

    The manufacturing methods of seamless steel pipe

    According to different manufacturing methods,seamless steel pipe can be divided into hot-rolled seamless steel pipe,cold-rolled seamless steel pipe,cold-drawn seamless steel pipe and extruded seamless steel pipe. What is hot rolled seamless steel pipe? Hot ...
  • The difference between API 5L Gr.B pipes and ASTM A106 Gr.B pipes

    The difference between API 5L Gr.B pipes and ASTM A106 Gr.B pipes

    API 5L Gr.B pipes and ASTM A106 Gr.B pipes are both carbon steel pipes and used for oil and gas transportation. Both of them can be welded,but ASTM A106 Gr.B pipes are seamless pipes. The difference between API 5L Gr.B pipes and ASTM A106 Gr.B pipes: API 5 ...
  • Difference between ERW pipes,SSAW pipes and LSAW pipes

    Difference between ERW pipes,SSAW pipes and LSAW pipes

    Electirc resistance weld(ERW),spiral submerged arc weld(SSAW),longitudinal submerged arc weld(LSAW) are the common methods of forming process of welded steel pipes.From manufacturing processes we can know that SAW steel pipes(LSAW steel pipes,SSAW steel pi ...
  • Spiral welded steel pipe production process

    Spiral welded steel pipe production process

    Spiral welded steel pipe production process: spiral steel pipe made of steel coiled coil as raw material,often heated and extruded,and welded by automatic double wire double-sided submerged arc welding process. 1. Raw materials are strip coils, welding wir ...
  • Differences between ASTM A106 and ASTM A53 pipe

    Differences between ASTM A106 and ASTM A53 pipe

    ASTM A106 and ASTM A53 are most commonly used carbon steel pipe types in industry today,and they’re very similar.However,they still have differences:ASTM A106 can only applies to seamless steel pipes,whereas ASTM A53 can either be seamless steel pipe ...