One month ago, we received an inquiry about Alloy 800 material from Russia. This inquiry including 3 items totally: 2 pieces 90 degree 610mm seamless elbow, one length 610x1500mm seamless pipe, one length 560x500mm pipe, it‘s a small quantity. As per ...

Sometimes we receive some orders about UNS S32750 material. It’s one kind of Super duplex stainless steel. This material is made of 25% chromium, 4% molybdenum and 7% nickel.  It has strong strength and corrosion resistance, and is mainly used in che ...

Today our Singapore clients order it’s finished. This order including duplex 2205(UNS S31803) and super duplex 2507(UNS S32750) pipe, fittings and flanges. As for this order, clients not only need fast delivery time 20 days but also the 100% PMI when ...

As shown in the picture below, the pipe bend in the picture is an order for a 2D carbon steel pipe bend required by an old customer in Shanghai. The customer’s carbon steel pipe fittings are basically purchased from our Hebei Haihao Group. ASTM A234 ...

At the beginning of last month, we received an order for carbon steel elbows from our old customer in Shanghai. The products are 2D elbows in sizes 200NB-600NB, which will eventually be used in projects in Africa. The order started very smoothly, with norm ...

Last week, one of Russia client come to us and express their requirements. They send us an inquiry about Incoloy 800 elbow and pipe. The quantity it’s small, DN600 elbow it’s 2 pieces. 610mmX9.53mmX1500mm pipe it’s one length, 560mmX9.53m ...

One piece 56″ ASTM A420 WPL 6 90 degree elbow it’s delivery to Indian port today! This order it’s cofirmed in the middle of this month. It’s our regular client’s order. ASTM A420 WPL6 ELBOW Before this order finally confirmed, ...

Recently one of Singapore customer inquiry some pipes, fittings and flanges, most items material it’s Super Duplex Stainless 32750.We offered the price and got the order as per this material. But when we arrange the production. The customer inform th ...

We closed a deal with a Korean customer at the beginning of the year.  The Korean customer has strict requirements. Before placing the order, we inspected the factory twice and conducted strict tests on the samples, including product size, thickness, appea ...

Duplex stainless steels are a family of grades combining good corrosion resistance with high strength and ease of fabrication.Their physical properties are between those of the austenitic and ferritic stainless steels but tend to be closer to those of the ...

Duplex stainless steel (DSS) refers to stainless steel in which ferrite and austenite account for about 50% respectively. Generally, the content of less phase also needs to reach 30% at least. When the content of C is low, the content of Cr is 18% ~ 28%, a ...

As mentioned in the previous article, our company and the customer finally determined the final test method. In order to ensure the quality of products and improve the customer’s trust in our company, all the manufacturing materials are directly take ...

Following the previous article, I continued to introduce the progress of the Indonesian order. After reaching an agreement with the customer to do ASTM G48 C experiment, the customer proposed to change it to ASTM G48 A. You must be curious about why the cu ...

In addition to ASTM A923 C mentioned above, the customer also provided another pitting test method, namely ASTM G48 C. In order to better understand the difference between the two, I now introduce ASTM G48 C. Method C – Critical Pitting Temperature T ...

The ferrite experiment was introduced in the first part. The experiment went well, but the pitting experiment was more twists and turns. Initially, the customer provided two tests: ASTM A923 C or ASTM G48 C. First, I will introduce ASTM A923 C, then ASTM G ...

Since the customer has such high requirements on the corrosion resistance of the material, it is natural that we are required to do pitting experiments after the production of the product, so as to verify the real corrosion resistance of the product. About ...

In the last article, we mentioned that our technical staff advised the customer to use S32205 instead of S31803. To introduce the difference between the two, we first need to introduce the metallographic structure and corrosion resistance of dual-phase ste ...

In mid-April,a new customer from Indonesia came to me and asked me to quote for his order of duplex stainless steel, which included steel pipes, pipe fittings and flanges. How did the client find me? Because when he searched online related keywords such as ...

Hebei Haihao Group is a manufacture specialized in producing flange, pipe fittings and steel pipe. Seamless steel pipes are everywhere in our life. The manufacturing process of seamless steel tube begins with solid round billet. Then the billet is heated t ...

Hebei Haihao Group is a professional manufacturer of flanges and pipe fittings. We not only have strong technical force, can produce standard, non-standard and customized high, medium, low pressure various specifications, various series of pipe fittings fo ...