Exploring the different types of marine flanges used in shipbuilding and offshore structures

Marine flanges are a crucial component in ship piping systems, as they connect different sections of pipes and equipment. There are several types of marine flanges, each designed for specific applications and conditions. Here are some of the most common types of marine flanges:

1.Weld Neck Flange: A weld neck flange is designed to be butt-welded to the pipe. It is preferred for high-pressure applications as it offers a good flow rate and provides excellent strength and leak-proof connections.

ASTM A182 F9 weld neck flange

2.Slip-On Flange: A slip-on flange is designed to slip over the pipe and then be welded in place. It is easy to install and is ideal for low-pressure applications.

ASTM A182 Gr.F304 304L ASME B16.5 RF blind flange

3.Blind Flange: A blind flange is used to seal off the end of a pipe or a valve. It is also used to block off a section of a pipeline for maintenance purposes.

ANSI ASME B16.5 class 150 threaded flange

4.Threaded Flange: A threaded flange is designed to be screwed onto a pipe with a threaded end. It is widely used in low-pressure applications where welding is not feasible.

Lap joint flange or loose flange finished in Haihao Group

5.Lap Joint Flange: A lap joint flange is designed to slide over the pipe and then be bolted in place. It is useful in applications where the alignment of the bolt holes is critical.

ANSI B16.5 socket welding flanges

6.Socket Weld Flange: A socket weld flange is designed to be welded to the pipe and then fitted with a socket for easy insertion of the pipe. It is preferred for small-diameter pipes and high-pressure applications.

The selection of the right type of marine flange depends on various factors such as the size of the pipe, the pressure rating, and the type of fluid being transported. At Haihao Group, we offer a wide range of marine flanges that meet different standards and specifications to meet the diverse needs of our customers.