Stainless steel grades 304, 304L, 316, and 316L are widely used across various industries for their excellent properties. Here’s a focused comparison highlighting their key differences: ANSI B36.19 SS304 SCH30 concentric reducer 304 vs. 304L Stainles ...

As a significant partner in the Belt and Road Initiative, Qatar has become an important market for Haihao Group. In recent years, we have expanded our business operations extensively in the region. Our piping system products are widely utilized in various ...

Thickness is one of the most critical structural parameters in the design of pressure vessels. It ensures structural strength, rigidity, and longevity under specified load conditions. Various thicknesses are strictly regulated by standards to ensure the re ...

Stainless steel welded elbows are integral components in various piping systems, renowned for their high performance and ease of installation. They are crucial for maintaining corrosion resistance and structural integrity in diverse industrial applications ...

For stainless steel pressure vessels, when designing according to ASME VIII – Ⅰ, the commonly used material standards for plates, pipes, forgings, bolts, and nuts can be found in ASME II Part A, mainly including the following: stainless steel pressur ...

Pressure vessels are critical components in various industries, designed to hold gases or liquids at high pressures. One of the most important aspects of their design is the selection and integration of heads and sealing devices. These elements ensure the ...

At Haihao Group, we understand the critical importance of staying updated with market trends, particularly in the raw materials sector, to better serve our clients and ensure optimal operational decisions. A recent iron ore market report from June 29 to Ju ...

Hydrostatic testing is a crucial method used to evaluate the integrity and pressure-holding capacity of pipes, vessels, or components. This process involves filling the test object with water and applying a specific pressure to assess its sealing performan ...

Pipeline prefabrication is a process in which the various parts of the pipeline system are pre-processed, assembled and welded into modules or sections in a factory environment. These prefabricated modules or sections are then transported to the installati ...

At Haihao Group, we understand the importance of staying updated with the latest trends and data in the steel raw materials market. By sharing relevant industry information, we aim to keep our clients informed and help them make well-informed decisions. He ...

Butterfly valves are widely used in various industries for their efficient flow control and compact design. A crucial aspect of their functionality is the sealing mechanism, which ensures the valve’s ability to prevent leakage. There are two primary ...

The API 5L GR.B ERW pipes are widely used material in the oil and gas industry. This pipe specification is designed to meet the stringent requirements for transporting natural gas, oil, and other fluids in both onshore and offshore applications. In this ar ...

In the field of material science and engineering, the integrity and durability of materials used in harsh environments are critical. Particularly in industries such as oil and gas, where equipment is constantly exposed to corrosive conditions, understandin ...

Hardness is a measure of a metal material’s resistance to localized deformation, particularly plastic deformation, indentation, and scratching. Higher hardness often implies better wear resistance. The hardness value depends not only on the material& ...

Effective maintenance of petrochemical equipment is crucial to ensure its longevity and efficiency. One of the key maintenance strategies employed in the industry is the “One Removal and Four Injections” technique, which plays a significant rol ...

Since entering June, the domestic cold and hot rolled coil market has not improved significantly. The market transaction is generally sluggish, and the prices of cold and hot rolled coils are fluctuating. Traders are generally cautious and optimistic about ...

At Haihao Group, we pride ourselves on our meticulous manufacturing processes and stringent quality control measures, particularly in the production of pressure pipeline components such as valves. Our commitment to excellence ensures that every valve we pr ...

As we enter June, the domestic market for hot and cold rolled coils remains stagnant, with trading activity showing little improvement. Currently, most traders are adopting a cautious outlook towards the future market trends. Recent Price Trends: In early ...

In the world of engineering and piping systems, threads play a crucial role in ensuring secure and reliable connections. Among the various types of threads, straight threads and tapered threads are two of the most commonly used. Understanding their differe ...

Haihao Group is proud to announce the successful delivery of a batch of premium pipe fittings to our valued customer in the United Kingdom. This shipment includes ASME B16.9 90° long radius elbows, ASME B16.9 45° long radius elbows, ASME B16.9 caps, and AS ...