Lecture 11. Testing procedure order of pipeline of ship stabilizer hydraulic system Purpose of the lecture icon

Lecture 11. Testing procedure order of pipeline of ship stabilizer hydraulic system Purpose of the lecture



НазваниеLecture 11. Testing procedure order of pipeline of ship stabilizer hydraulic system Purpose of the lecture
Дата конвертации22.08.2012
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Lecture 11. Testing procedure order of pipeline of ship stabilizer hydraulic system

Purpose of the lecture:

To study the procedure of pipeline testing of ship stabilizer hydraulic system


Questions:

Question 1. Hydraulic testing of hydraulic system pipeline of ship stabilizer.

Question 2. Ship stabilizer hydraulic system testing after installation on a ship.


Literature:

  1. Ship stabilizer RS6-1. Technical specification and operating manual for ship stabilizer RS-6-1 ИЕАШ.364273.170 ТО.

  2. Ship stabilizer RS6-1. Its location on a ship. Technical specification and operating manual for ship stabilizer 11356.360082.008.

  3. Dock repair manual for ship stabilizer RS-6-1 ГКЛИ.11356.364273.559 РДЭ-ЛУ.

  4. Principal repair technology for orders 1135.6; Mechanical repair works 3000-ПТ4 Т2 p.4.

Question 1. Hydraulic testing of hydraulic system pipeline of ship stabilizer.


After final manufacturing all the pipes and pipeline junctions of the ship stabilizer hydraulic system should be accepted by Quality Control department representatives.

During acceptance procedure they should check:

  1. The condition of weld seams and pipe outside surface at fold point by thorough examination;

  2. Quality of fold execution;

  3. Quality of pipeline end nodes and branching nodes performance and treatment.


If representatives of the QC Dept. have accepted the pipes, the latter should pass strength and density test. Pressure quantity should be set according to the branch standard. Usually hydraulic testing pressure quantity is half as large as operating pressure in a pipeline.

Nowadays hydraulic testing of pipes in a workshop are carried out at multiposted stands that ensure the testing of 10-12 pipes. To create pressure in a pipe blinds with gaskets are installed on its ends and are tightened with screw-clamps or turnbuckles.

The being tested pipe should remain under test pressure not less than 5h 10min and the pressure should not drop according to manometer. Besides, welding seams of flanges, run-outs, connecting pipes and lobes should be carefully examined.

When the welding seams of flanges, run-outs, connecting pipes and lobes are examined the pressure can be lowered to the operating one. Parts of pipes that border with welding seams should be examined by tapping with a hand hammer which weighs about 0.5 kg, but dints and dents should not be done.

The pipe is supposed to pass hydraulic testing if there is no leak or water drops and the pressure does not drop on the manometer.

If a leak is found in a welding seam or soldering seam the following actions should be done:

  • Faulty spot should be marked with a piece of chalk;

  • The pressure should be released;

  • The water should be removed;

  • The pipe should be delivered to welding or soldering bay.




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