When it comes to steel pipes, wall thickness plays a crucial role in determining their strength, pressure resistance, and suitability for various applications. There are multiple ways to represent pipe wall thickness, depending on industry standards and co ...

With less than a month remaining, the highly anticipated NEFTEGAZ 2025 exhibition is just around the corner! This prominent event, taking place in Moscow, Russia from April 14th to 17th, 2025, continues to solidify its position as one of the largest and mo ...

Since medium carbon steel is prone to cold cracks, hot cracks and other defects during welding, some special process measures need to be taken during welding to ensure normal welding. 1.Welding method Various arc welding methods can be used to weld medium ...

Carbon steel is a fundamental material in countless industries, prized for its strength, versatility, and cost-effectiveness. However, not all carbon steel is created equal. The amount of carbon present significantly influences its properties and applicati ...

Control valves are essential components in industrial process control, but they are prone to various issues that can impact performance and efficiency. Below are some common faults and their causes. 1.Valve Jamming and Blockage Jamming often occurs in newl ...

At Haihao Group, we pride ourselves on being a leading supplier of high-quality piping solutions tailored to meet the diverse needs of our clients worldwide. Today, we are excited to announce the availability of our ASME B16.11 standard 3000# ASTM A105 2&# ...

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 ...