Hebei Haihao High Pressure Flange & Pipe Fitting Group Co.

  • 3PE anti-corrosion pipe fittings

    3PE anti-corrosion pipe fittings

    3PE anti-corrosion pipe fittings refer to 3-coating polyolefin coating (mapec) external anti-corrosion pipe fittings. The anti-corrosion pipe fittings include elbow, tee, reducer, and other products. It is a common anti-corrosion pipe fittings. Other antic ...
  • Application of 3PE anticorrosive pipe fittings

    Application of 3PE anticorrosive pipe fittings

    There are many uses of 3PE anti-corrosion pipe fittings, and its function is really wide coverage. 1.Underground water supply and drainage, underground shotcreting, positive and negative pressure ventilation, gas drainage, fire sprinkler and other pipe net ...
  • 3PE anti-corrosive steel pipe

    3PE anti-corrosive steel pipe

    In China, 3PE anticorrosive steel pipes have been applied in oil and gas systems. nearly 4,000 kilometers of the national key project West-East Gas Pipeline have used 3PE anti-corrosion steel pipes. We have also exported a lot of 3PE coated steel pipes to ...
  • Q235B spiral steel pipes types

    Q235B spiral steel pipes types

    Q235B spiral tube is a commonly used raw material in spiral tubes. It is a spiral seam steel pipe welded with strip steel coil as the raw material and active double wire double-sided submerged arc welding. The main technical characteristics of the spiral s ...
  • Introduction of pipe thread

    Introduction of pipe thread

    Pipe threads are threads located on the pipe wall for connection. There are 55 degree unsealed pipe threads and 55 degree sealed pipe threads. Mainly used for pipeline connection, so that its internal and external threads are closely matched, there are two ...
  • The difference between pre-galvanized pipe and hot-galvanized pipe

    The difference between pre-galvanized pipe and hot-galvanized pipe

    The anticorrosion property of pipe is effectively improved by galvanizing. And the steel pipe galvanized mainly hot dip galvanized, pre-galvanized and galvanized three common methods, according to the final use of the steel pipe environment to choose the c ...
  • Why are the prices of 304, 304H and 304L stainless steel pipe fittings different?

    Why are the prices of 304, 304H and 304L stainless steel pipe fittings different?

    In fact, according to the content of chromium and nickel are 304 stainless steel, the composition contains 18% chromium (CR) and 8% nickel (Ni), but the main difference lies in the difference in carbon content. Among the three, the highest carbon content i ...
  • Why have FPSOs become so important for oil & gas companies?

    Why have FPSOs become so important for oil & gas companies?

    Conceptually, FPSOs have given oil and gas companies a lot of freedom and versatility with regards to exploration and extraction. FPSOs enables companies to produce oil & gas and explore increasingly remote areas at a cheaper price in comparison to tra ...
  • What does floating production storage and offloading (FPSO) mean?

    What does floating production storage and offloading (FPSO) mean?

    A floating production storage and offloading (FPSO) installation is a floating facility, usually based on a (converted) oil tanker hull. It is equipped with hydrocarbon processing equipment for separation and treatment of crude oil, water and gases, arrivi ...
  • Process and quality of welded flanges

    Process and quality of welded flanges

    A flange is used for attachment to another object, for instance, the end of a pipe. It can also be used for connection between two equipments, e.g. reducer flange, which is used for connection between the motor and the reducer, as well as the reducer and o ...
  • What are alloy steel A234 WP9 pipe fittings?

    What are alloy steel A234 WP9 pipe fittings?

    The process of manufacturing the ASTM specified A234 WP9 pipe fittings is referred to as wrought. Wrought grade fittings mean the alloy has been either cast or forged. The material used to produce ASTM A234 WP9 is low content alloy steel. One of the featur ...
  • Comparison of cold-rolled and hot rolled seamless steel pipes and their advantages and disadvantages

    Comparison of cold-rolled and hot rolled seamless steel pipes and their advantages and disadvantages

    There are mainly two kinds of stainless steel seamless steel pipes, namely, cold rolling seamless steel pipes and hot-rolled seamless steel pipes. The difference between them is obvious, each has its own advantages and disadvantages. Difference between col ...
  • Difference between straight seam steel pipe and seamless steel pipe

    Difference between straight seam steel pipe and seamless steel pipe

    The classification is different 1.Straight seam steel pipe: it is divided into metric electric welding steel pipe, electric welding thin wall pipe and transformer cooling oil pipe 2.Seamless steel pipe: seamless pipe is divided into hot rolled pipe, cold r ...
  • The thickness of thick-walled steel tube is uneven in three aspects

    The thickness of thick-walled steel tube is uneven in three aspects

    The uneven thickness of the thick-walled steel tube is mainly reflected in the uneven thickness of the spiral wall, the uneven thickness of the linear wall and the thick and thin wall at the head and tail. There are mainly three aspects as follows: 1.The c ...
  • Two common application methods for surface hardening of thick-walled steel tubes

    Two common application methods for surface hardening of thick-walled steel tubes

    Surface hardening of thick-walled steel tubes is a method of local quenching, in which a certain depth of hardened layer is obtained on the surface of the workpiece, while the core remains unquenched. When the surface is quenched, the surface of the workpi ...
  • Advantages and disadvantages of hot rolled precision steel tubes

    Advantages and disadvantages of hot rolled precision steel tubes

    For precision steel tubes, hot rolling is compared to cold rolling, which is rolled below the recrystallization temperature, while hot rolling is rolled above the recrystallization temperature. Advantages of hot rolled precision steel tube: It can destroy ...
  • Transverse and z-Direction CVN impact tests of X65 line pipe steels

    Transverse and z-Direction CVN impact tests of X65 line pipe steels

    Centerline segregation occurs as a positive concentration of alloying elements in the mid-thickness region of continuously cast slab. Depending upon its severity, it may affect mechanical properties and potentially downstream processing such as weldability ...
  • What is the difference between PSL1 And PSL2 pipes?

    What is the difference between PSL1 And PSL2 pipes?

    An API 5L line pipes manufactured in two varieties PSL 1 and PSL 2. But what is PSL? PSL stands for Product Specification Levels. Pipes are used in different types of environments such as corrosive and non-corrosive.Pipes used in the severe corrosive envir ...
  • Chemical composition and mechanical properties of API 5L sour service pipe

    Chemical composition and mechanical properties of API 5L sour service pipe

    Last article we know what is sour service pipe,today let’s see the chemical composition and mechanical properties of API 5L sour service pipe. API 5L Sour Service pipe Chemical Composition API 5L Sour Service pipe Chemical Composition 1). C and carbo ...
  • What is sour service steel pipe?

    What is sour service steel pipe?

    Sour services steel pipe is applied for pipelines in the corrosive environment. As we know, line pipe corrosion is an important factor affecting its safety service and service life. It will cause the leakage of oil and gas pipeline, some cases even explosi ...