Hebei Haihao Group

  • Haihao Group delivers bulk pipeline products shipment to Bangladesh

    Haihao Group delivers bulk pipeline products shipment to Bangladesh

    Haihao Group is proud to announce the successful delivery of a bulk shipment to our valued client in Bangladesh. This shipment includes a variety of high-quality pipeline products tailored to meet the specific needs of our client’s projects. Among th ...
  • Exploring EN 10253-2 P275NL1 SMLS Tee

    Exploring EN 10253-2 P275NL1 SMLS Tee

    In the dynamic realm of pipeline systems, precision and reliability stand paramount. It is under this guiding spirit that Haihao Group proudly unveils our latest endeavor: fulfilling the order for our esteemed Romanian client concerning EN 10253-2 P275NL1 ...
  • Welding procedure for metal pressure piping

    Welding procedure for metal pressure piping

    The welding process for metal pressure piping typically follows the steps outlined below: Pre-Welding Preparation: Welding Procedure Qualification: If the construction unit lacks a qualified welding procedure for pressure piping, a welding procedure qualif ...
  • Exciting new order from Singapore: Pipe system fittings delivered by Haihao Group

    Exciting new order from Singapore: Pipe system fittings delivered by Haihao Group

    We are thrilled to announce a new order from a valued client in Singapore. This order showcases Haihao Group’s commitment to delivering high-quality pipe system fittings on time and to precise specifications. The order includes a comprehensive range ...
  • Introducing Haihao Group's socket weld fittings: The epitome of quality and versatility

    Introducing Haihao Group’s socket weld fittings: The epitome of quality and versatility

    At Haihao Group, we take immense pride in offering a diverse range of pipeline solutions to meet the dynamic needs of our esteemed clients worldwide. Among our premium offerings, our socket weld fittings stand out as a testament to our commitment to excell ...
  • The role of spring washers in bolt applications

    The role of spring washers in bolt applications

    Spring washers, also known as split lock washers, play a critical role in ensuring the stability and integrity of bolted connections. Here’s an in-depth look at their functions, benefits, and usage guidelines. Functions of Spring Washers Preventing L ...
  • The role of flat washers in bolt usage

    The role of flat washers in bolt usage

    Flat washers are an essential component in the use of bolts and nuts, playing a crucial role in ensuring the integrity and durability of fastened joints. But how should you select the right flat washer for your needs? Here’s a guide to help you understand ...
  • Distinguishing applications of concentric and eccentric reducers by Haihao Group

    Distinguishing applications of concentric and eccentric reducers by Haihao Group

    Haihao Group recently dispatched a substantial shipment of ASME B16.9 SMLS concentric and eccentric reducers to our esteemed clients in Singapore. With sizes ranging from 3″ x 1.1/4″ to 14″ x 12″, these reducers, totaling over 450 u ...
  • Elevating welding excellence: introducing welding materials

    Elevating welding excellence: introducing welding materials

    Welding materials encompass various filler metals and additional protective substances used to enhance the quality of welding processes. Widely utilized in welding production, these materials primarily include welding rods, welding wires, fluxes, and more. ...
  • Haihao Group introduces welding rods and their classification to you

    Haihao Group introduces welding rods and their classification to you

    As an expert in the field of pipeline systems, Haihao Group not only produces and sells high-quality pipeline system supporting products, but is also proficient in various pipeline-related technologies, including welding and coating technologies. In the we ...
  • Haihao Group introduces you to gas metal arc welding (GMAW)

    Haihao Group introduces you to gas metal arc welding (GMAW)

    Haihao Group is a leading supplier in the field of pipeline systems. We are committed to providing customers with high-quality pipeline system supporting products and professional services. We have an experienced and skilled welding team who are proficient ...
  • Introduction to austenitic stainless steel's ultra-low temperature resistance process

    Introduction to austenitic stainless steel’s ultra-low temperature resistance process

    As an expert in the field of pipeline systems, Haihao Group has rich practical experience in the selection of product materials and product processing. Not long ago, we produced pipe fittings for Russian customers that can be used at minus 196 degrees Cels ...
  • Common welding methods for pressure pipelines

    Common welding methods for pressure pipelines

    Metal pipeline welding methods can be classified into three main categories based on the nature of the weld metal joint: fusion welding, pressure welding, and brazing. Fusion welding involves heating the joint to a molten state without applying pressure to ...
  • Essential measures to prevent cold cracking

    Essential measures to prevent cold cracking

    Cold cracking poses a significant threat, often resulting in catastrophic consequences. While only a small fraction of pressure vessel accidents worldwide are due to design flaws or improper material selection, the vast majority are caused by brittle fract ...
  • Metallographic Inspection: A vital tool for understanding internal metal structures

    Metallographic Inspection: A vital tool for understanding internal metal structures

    Metallographic inspection utilizes the principles of quantitative metallography to establish a three-dimensional morphology of alloy structures through the measurement and calculation of the microstructure of two-dimensional metallographic samples or films ...
  • Composition analysis of pressure pipe materials - chemical analysis method

    Composition analysis of pressure pipe materials – chemical analysis method

    Material composition analysis is one of the methods to evaluate the chemical composition and content of a product to determine whether it meets quality standards. According to the operation method, material composition analysis can be divided into chemical ...
  • Introducing bend testing for pressure pipeline materials

    Introducing bend testing for pressure pipeline materials

    Bend testing evaluates the mechanical performance of materials under bending loads. It involves placing a specimen of defined shape and size on a bending device, bending it to a specified angle around a predetermined radius, and then examining its deformat ...
  • Composition analysis of pressure pipeline materials—instrumental analysis method

    Composition analysis of pressure pipeline materials—instrumental analysis method

    We are pleased to introduce to you a material analysis method for pressure pipes – instrumental analysis. This is an advanced analysis method based on the physical or physicochemical properties of substances. It obtains analysis results by measuring ...
  • Diverse stainless steel fittings meeting varied standards available at Haihao Group

    Diverse stainless steel fittings meeting varied standards available at Haihao Group

    Haihao Group is pleased to introduce our wide range of stainless steel fittings, tailored to meet different standards, providing exceptional corrosion resistance and mechanical performance. Our products are meticulously crafted to ensure durability and rel ...
  • Introducing epoxy zinc-rich primer: The ultimate solution for corrosion protection

    Introducing epoxy zinc-rich primer: The ultimate solution for corrosion protection

    As a leading expert in the field of pipeline systems, Haihao Group prides itself on mastering various pipeline surface coating technologies to ensure the highest standards of protection and durability. One such innovative solution in our arsenal is the epo ...