Hebei Haihao Group

  • What causes the corrosion of pipe fittings?

    What causes the corrosion of pipe fittings?

    Corrosion of pipe fittings refers to the degradation and destruction of metal materials caused by the chemical and electrochemical action between the metal material surface and the environmental medium. In petroleum pipelines, common corrosion is mainly ca ...
  • Definition and details of butt weld fittings

    Definition and details of butt weld fittings

    Butt weld fittings general A pipe fitting is defined as a part used in a piping system, for changing direction, branching or for change of pipe diameter, and which is mechanically joined to the system. There are many different types of fittings and they ar ...
  • What is a reducer?

    What is a reducer?

    Reducer is one of the chemical pipe fittings, which is used for the connection of two different pipe diameters. It is also divided into concentric reducer and eccentric reducer. Reducer materials include stainless steel reducer, alloy steel, reducer carbon ...
  • ASTM A182 Stainless Steel Forged Fittings

    ASTM A182 Stainless Steel Forged Fittings

    A182 stainless steel forged fittings have good mechanical properties, less impurity and long service life, which are the top class among pipe fittings. Even in the harsh environment, they can also complete their missions very well. ASTM A182 cover stainles ...
  • What is alloy 32750 (UNS S32750) material?

    What is alloy 32750 (UNS S32750) material?

    Alloy 32750 (UNS S32750) is a super duplex stainless steel supplied in the solution annealed condition. As a super duplex stainless steel, it combines the desirable aspects of both austenitic and ferritic grades. The higher chromium, molybdenum and nitroge ...
  • What material is ASTM-A694 GR.F65?

    What material is ASTM-A694 GR.F65?

    F65 in ASTM a694 is carbon steel forging. The full name of A694 is ASTM A694. It is the forging of carbon steel and alloy steel pipe flange, fittings, valves and parts for high pressure transmission equipment. The grades of ASTM a694 are:F42,F46,F48,F50,F5 ...
  • API 5L Grb LSAW Line Pipe

    API 5L Grb LSAW Line Pipe

    LSAW submerged-arc longitudinal welded pipe (DSAW | Double Submerged arc welded):Tubular product having one or two longitudinal seams produced by submerged-arc welding. Specification Acc to API5L /ISO 3183 Quality Level: PSL1 and PSL2 Grade: Gr.B/BR/BN/BQ/ ...
  • Introduction of precision steel pipe

    Introduction of precision steel pipe

    Precision steel pipe is a kind of high precision steel pipe material which is processed by cold drawing or hot rolling. The precision steel pipe has high dimensional precision and high surface finish. After heat treatment, there is no oxide film on the inn ...
  • The processing technology of precision pipe

    The processing technology of precision pipe

    General precision pipe‘s production technology can be divided into cold drawing and hot rolling. The production process of cold rolled precision pipe is generally more complicated than that of hot rolled. The pipe billet should be rolled in three rol ...
  • What's the difference between casing pipe and drill pipe?

    What’s the difference between casing pipe and drill pipe?

    Oil Country Tubular Goods (OCTG) include a range of rolled metal products, commonly known as drill pipe, casing and tubing for the petroleum industry.Both are used in the drilling process.Do you know the difference between casing pipe and drill pipe? Types ...
  • Environmental protection value of ASME B16.9 standard stainless steel pipe fittings

    Environmental protection value of ASME B16.9 standard stainless steel pipe fittings

    The raw material of ASME B16.9 stainless steel pipe fittings is a kind of environmental protection material. The utilization rate of the pipe can reach 100%, that is to say, the material can be completely recycled. In this way, the problem of environmental ...
  • Processing technology of tee pipe fittings

    Processing technology of tee pipe fittings

    Tee is a kind of pipe fitting used at the branch of pipe. For using seamless tube to manufacture tee joint, there are two kinds of commonly used processes: hydraulic bulging and hot pressing. The hydraulic bulging of the tee is a forming process of expandi ...
  • Things you need to know about steel crystallization

    Things you need to know about steel crystallization

    By equipment such as furnace, converter, electric furnace, etc., steel is smelted and presented as liquid. In order to facilitate processing, it is cast in a mold of a certain shape and size, and after condensation, it constitutes a solid steel ingot and c ...
  • Comparison of pipe and tube

    Comparison of pipe and tube

    Pipes are used for transporting fluids and gases in Chemical, Petrochemical, Power Plants, Refineries, Storage units, compressed air systems, plumbing systems, etc. They are circular in cross-section and specified by Nominal Pipe Size. Tubes are used for m ...
  • Advantages and disadvantages of magnetic particle test

    Advantages and disadvantages of magnetic particle test

    The main advantages of magnetic particle testing: Find flaws on the surface and near surfaces Fast examination method with an immediate result An easy method as compared to other NDT methods Portable and low-cost equipment. Defects are visible directly on ...
  • Codes and standards for magnetic particle inspection

    Codes and standards for magnetic particle inspection

    Normally ASME Section V: Nondestructive Examination governs the magnetic particle examination methods for most of the organizations. However, there are various other codes and standards that provide guidance rules for magnetic particle test procedures as l ...
  • Steps for magnetic particle inspection

    Steps for magnetic particle inspection

    The magnetic particle inspection is performed in following below-mention six steps. 1. Surface Preparation: All surfaces and adjacent areas (within 1 inch) that will be examined must be free from rust, scale, sand, grease, paint, slag, oily films, or other ...
  • What is magnetic particle inspection (MPI)?

    What is magnetic particle inspection (MPI)?

    Magnetic Particle Inspection (MPI) is one of the most widely used non-destructive inspection methods for locating surface or near-surface defects or flaws in ferromagnetic materials. MPI is basically a combination of two NDT methods: Visual inspection and ...
  • Necessary ultrasonic testing for piping products

    Necessary ultrasonic testing for piping products

    Hebei Haihao Group offers various ultrasonic testing to detect defects in a wide range of piping components and materials. Ultrasonic inspection uses sound reflections in order to determine pipe thickness and to locate defects in welds and materials. Ultra ...
  • Items and methods of quality inspection for heat treatment

    Items and methods of quality inspection for heat treatment

    The technical requirements of heat treatment parts are different, the heat treatment process adopted is different, and the quality inspection items and methods are different. The quality inspection items and methods commonly used in heat treatment producti ...