Stainless steel is an alloy steel with high chromium and nickel content. It is generally categorized based on its corrosion resistance: stainless steel resists atmospheric corrosion, while acid-resistant steel withstands corrosion from acids and other highly corrosive media. These types are comm ...
As a strategic supplier for CNOOC, Haihao Group is delighted to see CNOOC’s recent accomplishments in the international oil and gas industry. China National Offshore Oil Corporation (CNOOC), through its subsidiary Offshore Oil Engineering Co., Ltd. (COOEC), has secured the EPCIC (Engineeri ...
From July 8 to July 12, the China Steel Price Index (CSPI) dipped again after a slight recovery the previous week, hitting a new low since the beginning of the year. Both the long products and flat products price indices declined.
Haihao Group
Weekly Index Performance
During the week, the CSPI s ...
The criteria for determining whether full (100%) or partial radiographic or ultrasonic inspection should be performed are outlined in section 10.3 of GB/T 150-2011 “Pressure Vessels.”
Pipe fitting ready for radiographic test
Full (100%) Radiographic or Ultrasonic Inspection
Pressure ...
Recently, the forebody of FPSO N1151 (P-82) was successfully launched at ZPMC Qidong Marine Engineering! The main hull of the FPSO N1151 project is constructed by Qidong COSCO Marine Engineering. This FPSO boasts a total length of 360 meters, a beam of 60 meters, and a depth of 34.3 meters, with ...
When designing pressure vessels, stainless steel is a commonly used material. For products that require resistance to corrosion or specific operating conditions, pickling and passivation are essential processes.
Stainless steel pipe fittings
Why pickling and passivation are necessary?
During the ...
In June, the domestic market for cold and hot rolled coils exhibited signs of weakness, with a decline in demand and fluctuating steel prices. For instance, in the Shanghai market, the price of 1.0 mm cold rolled steel (ST12) from Ansteel dropped from 4380 RMB/ton at the beginning of the month t ...
Stainless steels are highly valued for their excellent corrosion resistance, primarily due to the presence of chromium, which forms a protective oxide layer on the surface. However, certain conditions can lead to a specific type of corrosion known as intergranular corrosion (IGC), which occurs a ...
As a leading expert in the field of piping systems, Haihao Group prides itself on providing top-quality products that meet the rigorous standards of various pipeline engineering projects, including the manufacturing of pressure vessels. One crucial component of these projects is the use of faste ...
At Haihao Group, we closely monitor market trends in raw materials and keep our customers informed. According to the latest data from the National Bureau of Statistics, prices for six key black metal products have seen a noticeable decline in mid-June. This information is crucial for our clients ...
Duplex stainless steel (DSS) is a type of stainless steel where the microstructure consists of approximately equal amounts of ferrite and austenite, typically with at least 30% of the lesser phase. This unique composition grants DSS a range of advantageous properties, making it suitable for vari ...
At Haihao Group, we believe that staying informed about market trends is crucial for maintaining the highest standards in our products and services. We closely monitor the raw material markets and share valuable insights with our clients. Recently, the China Steel Price Index (CSPI) report highl ...
We are thrilled to witness the significant progress in China’s shale oil extraction industry with the successful establishment of the country’s first hydraulic fracturing test site. On June 20th, at the Changqing Qingcheng Oilfield, the site successfully completed coring operations f ...
Last week (June 17 – June 21), the overall price of domestic construction steel market showed a downward trend. Industry data showed that the average price of rebar fell by 52 yuan/ton week-on-week. According to a merchant engaged in construction steel trade, as the market gradually enters ...
Haihao Group, a leading enterprise in the pipeline system industry, extends its heartfelt congratulations to Qidong COSCO on the successful launch of Nigeria’s first Floating Liquefied Natural Gas (FLNG) vessel project. This monumental achievement was announced at the 2024 Investing in Afr ...
Haihao Group, a leading provider of pipeline systems and components, continuously monitors the raw materials market to better serve our clients. Recently, nickel prices have shown a significant decline due to multiple adverse factors, directly impacting the stainless steel market. This article e ...
Haihao Group, a leading provider of pipeline system products, is proud to announce that we have obtained certifications from several renowned classification societies, including ABS, DNV, BV, RINA, and RS. Our products have been instrumental in the construction of numerous large-scale vessels, i ...
June 16, 2024 – Haihao Group extends its heartfelt congratulations to China National Petroleum Corporation Offshore Engineering Company (CPOE) for securing an international contract worth over $100 million at its Qingdao marine engineering base. The contract, awarded by the American McDermott Gr ...
China Steel Price Index (CSPI) Weekly Report (June 3 – June 7)
From June 3 to June 7, the domestic steel price index in China continued to decline, with an increased rate of decrease. Both the long product price index and the flat product price index experienced drops.
During this period, ...
Haihao Group is proud to offer a wide range of welded steel pipes, also known as welded pipes. These pipes are manufactured by rolling steel plates or strips into shape and then welding the seams together. Welded steel pipes are known for their simple production process, high efficiency, and var ...
High carbon steel, characterized by a carbon content greater than 0.6%, has a greater tendency to harden compared to medium carbon steel. This increased hardenability results in the formation of high-carbon martensite, making the material more prone to cold cracking. The martensitic structure fo ...
As May draws to a close, the domestic market for cold and hot rolled coils continues to experience fluctuating transactions and prices. The market has seen a pattern of slight increases and decreases, creating a wave of cautious optimism among steel traders. Despite this, overall sales remain sl ...
At Haihao Group, we understand the importance of staying informed about the latest market trends in raw materials. By monitoring these changes closely, we aim to provide timely and valuable insights to our clients, helping them make informed decisions in their operations. Here is the latest upda ...
In the realm of welding, efficiency and quality are paramount. Enter the technique known as single-sided welding and double-sided forming, a process that revolutionizes welding efficiency and enhances the structural integrity of welded joints. Let’s delve into this innovative welding metho ...
