Operational Instruction 01 - rev. 1 of 29.09.2009 Internal Pressure Resistance Tests to be Performed on the Fittings and Tubes of the EQOfluids Lines 

1.       Safety: Due to the high pressure values ​​required for carrying out the tests, these must be performed in conditions of absolute safety. To avoid the risk of accidents, which could jeopardize the safety of the operator, some simple rules must be observed.

• The equipment to be used for testing must comply with local safety regulations.
• The materials to be tested can be single joints in union with pipe sections or directly connected to the fittings of the pressure system. In any case, the air present in all the components must be vented completely by means of a suitable vent point located at the highest point of the system.
• The components subjected to pressure must be immersed in the test fluid, in order to avoid the violent projection of splinters in the event of an explosion of these elements (in the even partial failure of the air bleeding).
• The area and / or the equipment destined for the tests must be adequately reported / and in such a way as to allow access only to authorized personnel.
• The test equipment must have a robust cover or protection shield properly dimensioned in order to guarantee protection in case of high-speed projection of parts of the sample or of the installation following sudden failure.

2.       Internal pressure resistance test :

2.1 Parameters

Test fluid: water or mineral oil (also hydraulic oil)

•  Test temperature: 23 ± 2 ° C
•  Test pressure: 90 bar
• Duration of the test: 1 hour
• Quantity of samples: 3 (also tested simultaneously)

2.2 Pressure procedure and required requirements

1.  Pressurize after correct air discharge.
2.  Reach the pressure of 60 bar in increments of 2 ÷ 3 bar every 3 ÷ 5 seconds.
3.  When the pressure of 60 bar is reached wait 10 ÷ 30 seconds, bring the pressure back to 0, tighten the ring nuts of the fitting (s).
4. Repeat the operation referred to in point 2 until the test pressure of 90 bar is reached.

The test is considered to have been passed if, during the one-hour period, material failures or pressure drops due to leaks are not observed. 

2. Bursting test. 

2.1 Parameters

Test fluid: water or mineral oil (also hydraulic oil)

Test temperature: 23 ± 2 ° C

Amount of cam Fluipioni: 3 (individually tested)

2.2 Procedure for putting into pressure and annotation of results

• 1. Pressurize after correct air discharge.
• 2. Reach the pressure of 60 bar in increments of 2 ÷ 3 bar every 3 ÷ 5 seconds.
• 3. When the pressure of 60 bar is reached wait 10 ÷ 30 seconds, bring the pressure back to 0, tighten the ring nuts of the fitting (s).
• 4. Make the pressure rise again in increments of 2 ÷ 3 bar every 3 ÷ 5 seconds until the failure of the system or the impossibility of a further rise in pressure due to substantial loss
• 5. Determine and note the maximum pressure value reached for each test.

For the purposes of the final registration, the minimum value obtained in the three tests is valid. 

3. Test report

The tests performed according to the procedures must be recorded in order to be used for certification purposes. 

The data to be indicated in the registration document must contain:

• Date and site of the test
• Trademark and / or company name of the client
• Name of the laboratory or body that performs the tests with possible reference to official certifications
• Code, description, nominal size and quantity of materials tested
• Batch or reference to the production period or the date of receipt of the sample.
• Sketch / diagram of the components under test
• If possible: photo of the assembly to be connected to the test equipment
• Indication of the measuring equipment / instruments used
• Test type description: indicate if Internal pressure or burst resistance with reference to this document
• Result of the test carried out with any photos of material with obvious signs of failure and / or any observations by the person in charge of the test

Signature of the manager