The heat treatment of pipe fittings and flanges is more and more widely used in industry. The function of heat treatment is to improve the mechanical properties of materials, eliminate residual stress and improve metal cutting processability. According to different purposes of heat treatment, he ...

Hebei Haihao Group is one of the leading manufacturers for pipe fittings and Flanges. We have focused on this filed for almost 40 years and has established good relationships with many customers all over the world. We can provide good products with high quality according to the customers’ ...

Imagine the time and effort wasted when you sent out one inquiry after another, compared one offer after another, and finally chose a company to work with. But when you receive the goods only to find that the goods are missing, damaged, the production does not meet the expected standards, which ...

I have a Spanish client who has placed an order with us for large size flanges. The materials of the order are 316L and S275JR. The drawing as below: Large size flange drawing Large diameter flange for flange and pipe welding, mainly used in welding technology, good performance of the use of cha ...

Insulation joint is an improved replacement product based on the problems existing in the use of insulation flange. It is an important element of pressure and is essential to the cathodic protection system of steel pipes. It is widely used in the cathodic protection system of steel pipes. Insula ...

Hebei Haihao Group is one of the leading pipeline material manufacturer in China. We are specialized in carbon steel, stainless steel and alloy steel flange, fittings and pipe. Here we introduce one kind of flange – Orifice flange ANSI ASME B16.36 orifice flange General Description ANSI/AS ...

After nearly two months of production, a batch of stainless steel flange production was completed. After the inspection by the quality inspection department of the factory, all the data are qualified and ready to be sent to Egypt today. ANSI/ASME B16.5 304 raised face plain flanges One day more ...

Weld-neck flange is a kind of pipe fittings, which refers to the flange with neck and transition of round pipe and Weld-neck connection with pipe. Weld-neck flange with neck is a kind of steel hot pressed or forged flange. Its connection form is directly Weld-neck the flange and steel pipe. The ...

This week, we received a complaint from a customer about another supplier. The flange we bought from another supplier was leaked. We would like to ask for our inquiry and purchase again. Today, let’s take a look at the causes of flange leakage 1.Wrong mouth, refers to the pipe and flange a ...

Wind power flange is a structural member connecting each section of tower or between tower and hub, hub and blade, which is usually connected by bolts. Wind power flange is also called wind tower flange, and its process mainly includes the following steps: Source of raw material refining export ...

Weld neck flange is a kind of pipe fittings, which refers to the flange with neck and transition of round pipe and weld neck connection with pipe. Weld neck flange is not easy to deform, well sealed and widely used. It has corresponding rigid and elastic requirements and reasonable weld neck thi ...

As shown in the figure, 32-inch weld neck(WN) RF flange, 300#, material A105, according to the standard ASME B16.47A, the customer placed an order in early May, and it is expected to be delivered to Colombia in early June, which is used in the construction and use of large pipelines. Markings ar ...