NBK&LR Marine Precision Tubes Help Mitigate "Water Hammer Phenomenon "

    Compared with other transmission modes, hydraulic transmission has the advantages of frequent start and speed change, large output torque, low linear speed and rotational speed, small volume and weight, so it has been widely used in the shipbuilding industry.   However, due to the special working conditions of the ship at sea, when the hydraulic transmission system has pipeline burst, valve damage, joint oil leakage, etc., the on-site maintenance is difficult and even poses a threat to shipping safety.   In the hydraulic system, when the flow rate and direction change sharply, the process of fluid pressure rising and falling sharply in the pipeline is called hydraulic impact, commonly known as "water hammer phenomenon", and "water hammer phenomenon" is the main cause of pipeline burst.   And the length of the pipeline, inner diameter, wall thickness, inner wall finish, cleaning process, pipeline interval inner diameter difference will affect the intensity of the "water hammer phenomenon".

     In July, our company received an inquiry from a Marine hydraulic equipment   manufacturer, which required a batch of hydraulic pipes in line with the LR standard, and the connection mode of the pipes was clamp sleeve.   At the same time, the customer reported that the valve was damaged and the joint was leaking oil. After communication, our company suggested that this batch of hydraulic steel pipes should be delivered by high-precision cold rolling process and non-oxidized bright heat treatment state (NBK).   High precision rolling ensures seamless docking between the steel pipe size and the sleeve, no oxidation heat treatment can achieve the inner wall roughness with not exceeding Ra1.6, smooth inner wall reduces the damage risk of valve parts;   Finally, high pressure clean off the mechanical impurities in the inner wall of the pipe, and do the corresponding rust treatment to facilitate the use of long cycle batch cutting customers.

   NBK Marine hydraulic pipes have great advantages in reducing the "water hammer phenomenon" and ensuring pipeline cleaning. Through scientific design of pipe diameter, wall thickness and reasonable pipeline layout, the failure rate of Marine hydraulic pipes can be effectively reduced.