Refrigerant Pipe Pressure Field Test

This article is about Refrigerant Pipe Pressure Field Test as per International Codes and standards.

Refrigerant Pipe Pressure Field Test

TEST PROCEDURE AND CHECKLIST

1. Blow out all lines with dry nitrogen prior to testing and charging.
2. Test shall be performed with dry nitrogen or another nonflammable, nonreactive , dried gas. Oxygen, air or mixture containing them shall not be used.
   Exceptions:
   a) Mixtures of dry nitrogen, inert gases, or a combination of them with nonflammable refrigerants in concentrations of refrigerant weight fraction (mass fraction) not exceeding 5% are allowed for tests.
   b) Mixtures of dry nitrogen, inert gases, or a combination of them with flammable refrigerants in concentrations not exceeding the lesser of a refrigerant weight fraction (mass fraction) of 5% or 25% of the LFL are allowed for tests
   c) compressed air without added refrigerant is allowed for tests provided the system is subsequently evacuated to less than 1000 microns (132pa) before charging with refrigerant. The required evacuation level is atmospheric pressure for system using R-718 (water) or R-744 (carbon dioxide) as the refrigerant.
   d) Systems erected on the premises using Group A1 refrigerant and with copper tubing not exceeding 0.62 in. (16 mm)outside diameter shall be tested by means of the refrigerant charged into system at the
   saturation vapor pressure of the refrigerant at 68 degree F minimum.
3. ANSI / ASHRAE- Standard 15, Para 10.1.2)”
4. The high and low side of each system shall be tested and proved tight at not less than the lower pressure in table 11-D of UMC (see attached table) or the setting of the pressure relief device. (UMC Para 1122.2).
5. The required test pressure shall be maintained for 10 minutes.

Refrigerant Piping Installation | Lay-out | Material | Specification

TEST EQUIPMENT AND MATERIALS CRITERIA

See SATIP-A-004-02 for:
Calibration Test Report-Pressure Gauge (SATR-A-2002)
Calibration Test Report-Test Relief Valve (SATR-A-2006)

TEST RESULTS

Pressure recorded at the start of the Test _____________psig.

Pressure recorded at the end of the test _____________ psig.

Test results are acceptable and in accordance with Saudi Aramco Engineering Standards and contractual requirements.

Standards Codes and References For Fan Coil Installation

1. SAES-K-001 – Heating, Ventilating and Air Conditioning (HVAC).
2. SAES-K-100 – Saudi Aramco Mechanical (HVAC) Code.
3. ASHRAE Standard 15 — Safety Standard for Refrigeration Systems, 2001
4. Uniform Mechanical Code (UMC).
5. Uniform Fire Code (UFC), 1997.
6. HVAC Metal Duct, Hangers and Supports and Insulation Receiving.
7. HVAC Chilled Water Piping Lay-out and Support.
8. HVAC Condensate Drain Installation | HVAC Engineering.
9. HVAC Two Way and Three Way Control Valve Arrangement (Chilled Water Lines).
10. HVAC Air Handling Unit (AHU) Installation | HVAC Engineering.
11. Air Cooled Condenser Installation | Design | Technical Specification.
12. Chilled Water System Components Receiving, Handling, Storage and Preservation Inspection.
13. HVAC Exhaust Fan Receiving, Handling and Preservation.
14. HVAC Air Handling Unit (AHU) Receiving, Handling, Storage and Preservation..
15. HVAC Duct System Handling, Storage and Preservation.
16. Commercial Kitchen Hood Installation | Selection | Technical Specification.

Refrigerant Pipe Pressure Field Test as per UNIFORM MECHANICAL CODE