In recent years, Haihao Group has contributed to numerous offshore pipeline projects, including subsea pipelines, large-scale ship pipeline systems, and drilling platform construction. With certifications from major classification societies such as ABS, DNV, and BV, we possess a deep understandi ...
As a specialist in the pipeline systems industry with extensive experience in large-scale marine vessel construction and certifications from leading classification societies such as ABS, DNV, and BV, Haihao Group extends our heartfelt congratulations on the successful launch of China’s fir ...
The offshore oil and gas industry is witnessing a groundbreaking transformation with the advent of all-electric Floating Production Storage and Offloading units (FPSOs). Recent developments, such as Seatrium’s construction of P-84 and P-85 FPSOs and TotalEnergies’ Kaminho project, hi ...
Metal materials exhibit several key mechanical properties, including strength and plasticity, hardness, impact toughness, and fatigue strength. These properties and their testing methods play a vital role in material selection and performance evaluation for mechanical components, ensuring their ...
At Haihao Group, we continuously meet the needs of our customers by delivering high-quality pipeline accessories. Recently, a customer placed an order for galvanized bolts, nuts, and non-asbestos gaskets, all tailored to their specifications and ready for shipment.
Product Details
Galvanized Bol ...
Haihao Group has successfully completed the delivery of a batch of hot-dip galvanized 45-degree long radius elbows for a domestic customer. These pipe fittings are tailored to meet high-performance requirements while ensuring durability and corrosion resistance, particularly in challenging envir ...
Intergranular corrosion (IGC) is a critical issue for austenitic stainless steels, and effective measures must be taken to prevent and control it. Based on its mechanism, the following strategies are widely adopted:
1.Use of Ultra-Low Carbon Stainless Steel
Reducing the carbon content to below 0 ...
Haihao Group proudly delivered a batch of ASME B16.9 A234 WPB 45-degree long radius elbows to a domestic customer. These elbows are meticulously crafted to meet the highest standards of quality and reliability, ensuring optimal performance in industrial piping systems.
ASME B16.9 A234 WPB 45 deg ...
At Haihao Group, we take pride in delivering customized, high-quality piping solutions tailored to the unique needs of our global clientele. Recently, we successfully completed a special order for our Singapore customer, providing ASME B36.10M pipe nipples made from A-335 Grade P11 material. The ...
Haihao Group is proud to announce the successful delivery of a batch of ASME B16.9 ASTM A815 UNS S32750 seamless 90-degree elbows to our Singapore customer. These high-performance elbows are designed for use in critical applications requiring excellent corrosion resistance and mechanical strengt ...
At Haihao Group, we specialize in providing high-quality pipeline solutions tailored to the specific needs of our global customers. Recently, we completed a significant order for our UAE customer, delivering ASME B16.9 A815 Gr.S31803 seamless concentric reducers. These reducers are designed to m ...
The MSS SP-97 threaded outlet is a type of reinforcement pipe fitting used for branch connections, commonly referred to as a threaded olet. It provides a modern solution for connecting branch pipelines, serving as a replacement for traditional methods such as reducing tees, reinforcement plates, ...
Overlay welding is a welding process used to increase or restore the size of a component or to provide its surface with a layer of deposited metal possessing special properties. This technique enhances the surface of components with characteristics such as wear resistance, heat resistance, corro ...
At Haihao Group, we are proud to support the LNG (Liquefied Natural Gas) industry in the Middle East with our high-quality steel pipes. These pipes, inspected and certified by Bureau Veritas (BV) surveyors, meet the rigorous demands of marine and energy projects. As specialists in Marine enginee ...
In our latest order for a domestic client, Haihao Group produced a variety of pipeline components, including ERW pipes and seamless pipes, tailored to meet the project’s unique requirements. The ERW pipes came with beveled ends (BE), while the seamless pipes featured threaded ends (THD). Underst ...
Heat treatment is a crucial process in metallurgy that significantly influences the mechanical properties and structural integrity of metals. Among the various types of heat treatments, normalizing stands out as a fundamental technique used to enhance the performance of steel components. For our ...
Weld porosity, a common defect in welded joints, occurs due to the entrapment of gases in the molten metal during the welding process. The formation of porosity is influenced by a variety of factors, including metallurgical and process-related elements. Understanding these factors is crucial in ...
As an integrated supplier of pipeline system products, Haihao Group often assists clients with welding services for pre-fabricated pipeline products. Our expertise in various welding techniques and practices allows us to address common welding challenges, one of which is weld porosity. This arti ...
At Haihao Group, we’re excited to announce that a shipment of large-size welded pipes, manufactured to ASME B36.10M specifications and made from A516 Grade 70 carbon steel, is now ready for dispatch to Italy. These pipes are designed to meet the needs of industries requiring robust, high-p ...
At Haihao Group, we pride ourselves on providing premium pipeline solutions tailored to the needs of industries worldwide. Recently, we successfully completed the shipment of several containers filled with top-quality carbon steel pipe fittings, flanges, and pipes to Brazil. This shipment includ ...
In the production of high-quality steel products, controlling the levels of sulfur and phosphorus is crucial, as these elements can negatively impact the material properties, such as ductility, toughness, and overall strength. Sulfur, being a harmful impurity, can cause hot cracking during weldi ...
NACE MR0175, also known as ISO 15156, is a globally recognized standard that specifies the requirements for materials used in oil and gas environments containing hydrogen sulfide (H₂S), which can lead to sulfide stress cracking (SSC) and other types of corrosion. Established by NACE Internationa ...
Why Solution Treatment Matters in Pipe Fitting Manufacturing
In pipeline construction, stainless steel fittings occasionally suffer from stress corrosion cracking. One common cause is the omission of solution heat treatment during production—a shortcut some manufacturers take to cut costs. Howev ...
Haihao Group, a leader in the field of piping systems, proudly offers the A182 F347H forged lateral tee, designed to meet the rigorous demands of various industries, including nuclear energy and aerospace. This product exemplifies our commitment to quality and reliability, providing exceptional ...
