At Haihao Group, we are dedicated to delivering high-quality fastening solutions to meet the diverse needs of our global customers. Recently, we successfully completed an order for a valued customer, supplying a batch of full thread bolts, nuts, and fl ...

We are delighted to announce the completion of an order for galvanized flat gaskets for our Russian customer. These gaskets are made of premium carbon steel and are engineered to provide excellent performance and durability. galvanized flat gaskets Product ...

A-335 Gr. P11 is a widely used chromium-molybdenum alloy steel designed for high-temperature and high-pressure environments. Known for its superior mechanical properties, chemical stability, and thermal resistance, this material is extensively utilized in ...

At Haihao Group, as experts in piping systems, we not only provide reliable piping products but also excel in maintenance practices for various pipeline systems. Proper maintenance and care are essential for pressure pipelines to ensure their safety, perfo ...

At Haihao Group, we take pride in providing high-quality pipeline products that cater to the specific requirements of our customers. We recently completed a significant order for our UAE customer, delivering ASME B16.9 A815 Gr.S31803 seamless concentric re ...

Pipe caps, essential components in pipeline systems, are used to seal or protect the ends of pipes. Besides threaded connections, several other methods are employed to connect pipe caps to pipes, depending on the material, pressure, temperature, and applic ...

Our client recently placed an order for ASME B16.9 concentric reducers made of ASTM A234-WPB material, with a galvanized surface treatment. These butt-welded reducers are used to connect pipes of different diameters in a smooth and efficient manner, ensuri ...

Thickness measurement plays a critical role in ensuring the integrity and safety of various materials, especially in industries like pipeline systems, pressure vessels, and structural components. Traditionally, manual measurement methods such as calipers a ...

Weld porosity is one of the most common defects found in welding. It occurs when gas becomes trapped in the molten weld pool during the solidification process, leading to small holes or voids in the weld metal. These voids can weaken the weld’s struc ...

Weld porosity is a common defect that occurs during the welding process, resulting from gas entrapment in the weld metal. Understanding the different types of weld porosity and their causes is crucial for preventing this issue and ensuring the integrity of ...

Haihao Group recently completed an order for a domestic client who required specialized A234 WP22 Class 1 180° elbows. These elbows are specifically engineered for high-pressure and high-temperature applications, showcasing our capability to deliver custom ...

At Haihao Group, we are committed to providing our clients with the highest quality pipeline products, engineered to meet the demands of industries worldwide. Recently, we completed the successful shipment of a range of ASME B36.10 ASTM A106 Grade B pipes ...

In piping systems, both seamless and welded pipe fittings play essential roles. However, their manufacturing processes differ, and as a result, their quality control requirements also vary. This article will highlight the key differences in the inspection ...

ASTM A860 is a standard that covers the specifications for forged low alloy high strength butt-weld fittings used in high-pressure oil and gas transmission and distribution systems. These fittings, made from seamless or electric fusion welded pipe material ...

When it comes to piping systems, flanges play a crucial role in ensuring the integrity and performance of connections. Two widely recognized standards for flanges are ASME B16.5 and ASME B16.47. While both standards serve important functions in the industr ...

ASTM A182 F9 is a specification that covers forged or rolled alloy steel flanges, fittings, valves, and parts for high-temperature service. This material, known for its exceptional strength and resistance to high temperatures, is particularly suited for de ...

In fastening systems, the hardness relationship between bolts and nuts is a critical factor in achieving reliable and effective fastening. Generally, nuts are manufactured to have a slightly lower hardness than bolts, and this difference is intentional to ...

Haihao Group is excited to announce our participation in the upcoming Abu Dhabi International Petroleum Exhibition & Conference (ADIPEC) 2024, which will take place from November 4th to November 7th. This prestigious event is held annually at the Abu D ...

Pressure vessels are essential components in various industries, designed to hold gases or liquids at high pressures. The shape of the pressure vessel significantly influences its design, application, and maintenance. Circular and square pressure vessels a ...

To effectively prevent and control corrosion in open-loop Exhaust Gas Cleaning Systems (EGCS) piping, the following measures can be implemented: 1.Increase Inspection Frequency For vessels equipped with open-loop EGCS, it is essential to increase the inspe ...