Haihao Group has successfully delivered a significant order of high-quality pipe fittings to a client in Singapore, showcasing our expertise in manufacturing and supplying products made from ASTM A350 GR. LF2 CL1 material. This delivery underscores our com ...

The IX Seal Ring is a high-performance metal-to-metal sealing component used in compact flanges (EN ISO 27509, API 6A). It is widely applied in high-pressure, high-temperature, and subsea environments, providing a secure and leak-proof connection. Shape an ...

A 45° socket weld latrolet is a specialized branch connection fitting designed to create a 45-degree outlet from a run pipe. It belongs to the olet family and is widely used in high-pressure and high-temperature piping systems. 45° Socket Weld Latrolets Pr ...

Positive Material Identification (PMI) is a crucial testing method used in the metal industry to verify the chemical composition of materials. PMI spectral analysis utilizes advanced spectroscopy techniques to accurately determine the elements present in m ...

Haihao Group would like to extend our heartfelt congratulations to COOEC Engineering on successfully renewing their Long-Term Agreement (LTA) with Saudi Aramco. This milestone marks a significant achievement in COOEC Engineering’s continued growth an ...

Penetrant testing (PT) is a widely-used non-destructive testing method for detecting surface defects. There are various ways to classify penetrant testing based on different parameters. Below are the main classifications of penetrant testing: penetrant tes ...

Low-temperature pressure vessels operate under extreme conditions where thermal stress, material brittleness, and structural integrity are critical concerns. To ensure safety, reliability, and long-term performance, specific structural design principles mu ...

A mitre elbow is a type of pipe fitting that is used to change the direction of a pipeline. Unlike standard elbows, which are typically a single curved segment, a mitre elbow is made up of multiple straight segments (or “legs”) connected at a s ...

When disassembling a heat exchanger, there are several important considerations to ensure the process is safe, efficient, and does not damage the equipment. Here are some key points: Measure and Record the Tightening Length: Before disassembling the heat e ...

Annealing is a heat treatment process in which steel parts are heated to a certain temperature, held at that temperature for a period of time, and then slowly cooled to room temperature. This process helps to relieve stresses, improve mechanical properties ...

ASTM A53 is a standard specification for carbon steel pipes that are used in pressure and structural applications, as well as for conveying steam, water, gas, and air. The two primary grades under ASTM A53 are A53A and A53B. While both grades are suitable ...

304 and 304H stainless steels are both part of the austenitic stainless steel family, offering excellent corrosion resistance and strength. According to the content of chromium and nickel, they are all 304 stainless steel, containing 18% chromium (Cr) and ...

Sulfur (S) is a key element affecting the Hydrogen-Induced Cracking (HIC) and Sulfide Stress Cracking (SSC) resistance of pipeline steel. Studies have shown that when the sulfur content in steel exceeds 0.005%, the sensitivity to HIC increases significantl ...

Haihao Group, a leading manufacturer and supplier of pipe fittings renowned for its commitment to excellence and customer satisfaction, is pleased to announce the successful securing of a significant order from a esteemed client in Iran. This latest collab ...

Haihao Group, a global leader in precision-engineered pipe fittings, is thrilled to announce the successful delivery of a specialized weldolet order to clients in Singapore. Manufactured to MSS SP-97 standards and crafted from ASTM A182 GR. F51 duplex stai ...

High carbon steel presents significant challenges in welding due to its high hardenability and susceptibility to cracking. To ensure strong and defect-free welds, the following precautions should be taken: 1.Welding Thin Plates (≤5mm Thickness) For workpie ...

Weldability of High Carbon Steel High carbon steel, with a carbon content greater than 0.6%, has high hardenability and tends to form brittle, hard martensite. This makes it highly prone to cracking in the weld and heat-affected zones, making welding diffi ...

As an expert in pipeline systems, Haihao Group frequently handles prefabrication orders, many of which involve welding. Medium carbon steel welding presents specific challenges due to its higher carbon content compared to low carbon steel. Weldability of M ...

In the competitive world of industrial supplies, finding a reliable partner who can deliver high-quality products while meeting stringent international standards is crucial. At Haihao Group, we pride ourselves on being that partner for our valued clients, ...

Temperature plays a crucial role in the accuracy of measurements, and its influence should never be underestimated. While factors like humidity, vibration, dust, and corrosive gases can also affect measurement precision, temperature variations have the mos ...