EN_NR_34_ESTANQUIEDADE.pdf

Transcript

1. NR-34 Leak Test
2. Leak Tests What materials are used to perform a hydrostatic or leak test?
3. Hydrostatic test Water is commonly used as the test fluid. In systems or vessels that are not designed to receive water, a pneumatic test can be performed to achieve the same result.
4. Leak test This test can be performed using the system's own fluid – drinking or fire- fighting water, air, etc. Nitrogen or helium is also used as the test fluid when the leak is caused by micro-cracks.
5. Application and Legislation Field of Application
6. Application and Legislation Where we frequently find discontinuities where the leak tightness test can, or should, be used:
7. Application and Legislation Petroleum: oil pipeline, gas pipeline, tanker, storage tank, etc; Nuclear: encapsulation of fuel element, storage of atomic waste, production, processing and handling of radioactive material, etc.; Boilermaking: pressure vessel, heat exchanger, boiler, etc.; Auto parts: radiator, brake system, wheel, thermostatic valve, acoustic and thermal insulation, fuel pump, battery, coil, shock absorber, etc. Chemistry: production facility that works with acids, chlorine, ammonia, esters, etc.
8. Food industry; Automotive industry; Rubber industry; Civil construction; Pharmaceutical Industry; Petrochemical industry; Steel Industry; Offshore industry; Naval Industry Non-destructive leak testing is widely used in Brazilian industry, such as:
9. What can be tested? Equipment/Materials to be Tested
10. Tested materials: carbon steel, alloy steels, nickel alloys, duplex stainless steels, ferritic, martensitic and austenitic. Welded joints of tanks, pressure vessels and pipelines can be tested.
11. 34.14 Leak Tests NR-34 (ITEM 34.14) 34.14.1 A leak tightness test is considered to be a non- destructive test carried out by applying pressure to a part, compartment or pipe to detect leaks.
12. 34.14 Leak Tests NR-34 (ITEM 34.14) 34.14.2 The preparation and qualification of the procedure, as well as the execution and supervision of the test, must be carried out by a qualified professional in accordance with relevant national technical standards and by independent bodies that comply with ABNT NBR ISO IEC 17024.
13. 34.14 Leak Tests NR-34 (ITEM 34.14) Helmets to identify workers performing hydrostatic leak tests
14. Robes NR-34 (ITEM 34.14) 34.14.3 Workers performing the leak test must wear easily visible identification that distinguishes them from others.
15. NR-34 (ITEM 34.14) 34.14.4 The test system must have a pressure regulator, safety valve, relief valve and a calibrated and easy-to-read pressure gauge.
16. NR-34 (ITEM 34.14) 34.14.5 The design of the leak testing system must be prepared by a legally qualified professional.
17. NR-34 (ITEM 34.14) 34.14.5.1 A calculation record of the design of the leak testing system must be kept in the establishment. We can see below:
18. NR-34 (ITEM 34.14) Before starting activities, the following safety measures must be adopted: a) issue the PT.
19. NR-34 (ITEM 34.14) Before starting activities, the following safety measures must be adopted: b) evacuate, isolate and signal the risk area defined in the procedure;
20. NR-34 (ITEM 34.14) Expansion joints, accessories, instruments, and pressure gauge glasses that cannot be subjected to pressure tests must be removed and isolated.
21. NR-34 (ITEM 34.14)
22. NR-34 (ITEM 34.14) 34.14.10 A safety valve with opening pressure adjusted in accordance with the test procedure must always be used.
23. NR-34 (ITEM 34.14) 34.14.11 After reaching the test pressure, the test system must be blocked from the tested system.
25. NR-34 (ITEM 34.14)
26. NR-34 (ITEM 34.14)
27. NR-34 (ITEM 34.14) 34.14.15 During the tests, the pressure must be gradually increased to the final test pressure.
28. Preliminary Risk Analysis (PRA) The APR must include at LEAST: 1. System explosion during testing 1. Asphyxiation with test gas 2. Whipping 3. Eye injuries caused by projectiles or fluid (gas or liquid) 4.
29. Technical Standards
30. Technical Standards
31. Technical Standards
33. Technical Standards manufacturer's name; order number given by the boiler manufacturer; year of manufacture; maximum permissible working pressure; manufacturing hydrostatic test pressure; steam production capacity; heating surface area; project code and year of publication.
34. Equipment
35. Equipment Pipeline Leak Testing Device (DTVD) – Medium and High Pressure for performing leak tightness tests on pipelines.
36. Equipment
37. Equipment
38. Equipment
39. Equipment
40. Equipment
41. Equipment
42. Equipment
43. Special Characteristics of the Systems to be Tested The selection of the appropriate test method generally depends on the following parameters: Allowable leakage rate value 1. Test type: leak location or measurement 2. Component specifications to be tested: dimensions, pressure or vacuum resistance limits, assembly materials, surface finish, etc. 3. Conditions of use and testing 4. Safety and environmental parameters 5.
44. Some of the applicable methods are shown below.
45. Some of the applicable methods are shown below.
46. Some of the applicable methods are shown below.
47. Positive pressure bubble formation
48. Positive pressure bubble formation
49. Positive pressure bubble formation
50. Negative pressure bubble formation
51. Negative pressure bubble formation
52. Capillarity
53. Capillarity
54. Capillarity
55. Capillarity
56. Hazard Identification and Risk Analysis; Danger One or more conditions of a variable with the potential to cause harm. Such harm may be understood as injury to people, damage to equipment or structures, loss of material in process, or reduction in the capacity to perform a predetermined function. Where there is a risk, the possibility of adverse effects persists.
57. Hazard Identification and Risk Analysis; Risk
58. Hazard Identification and Risk Analysis; Security
59. Hazard Identification and Risk Analysis; Security It is often defined as “risk-free”. However, it is practically impossible to completely eliminate all risks. We can therefore define security as a condition or set of conditions that aim at relative protection against a given risk.
60. Hazard Identification and Risk Analysis; Probability: It is the chance of a failure occurring that could lead to a certain accident. This failure could be in a piece of equipment or a component thereof, or it could even be a human error.
61. Hazard Identification and Risk Analysis; Consequence/Damage It is the measure of the result of an accident at work or of major accidents. It can also be defined as the severity of human, material or financial loss, or the reduction in the capacity to perform a predetermined function in a given system.
62. Hazard Identification and Risk Analysis; Consequence/Damage
63. Protective equipment AND It is any device or product, for individual use, used by the worker, intended to protect against risks that may threaten safety and health at work.
64. Protective equipment EPC
65. Protective equipment
66. Protective equipment
67. Protective equipment Boots
68. Protective equipment Overalls
69. Protective equipment Ear Protection
70. Protective equipment Safety Glasses
71. Protective equipment Helmet
72. NR-26: Purpose of colors in the workplace as safety signs.
73. NR-26:
74. NR-26: Your safety also depends on you.