ASHRAE Std 34 Refrigerant Flammability

ASHRAE Standard 34: Fractionation/Flammability Testing

DEKRA can fully assist you with your ASHRAE refrigerant blend testing and application needs. We can obtain the necessary components for your blend, then mix, analyze, perform the required testing per ASHRAE Standard 34, and prepare the Section Application for your submission to ASHRAE for approval, and attend the ASHRAE Convention to present the application on your company’s behalf. Our ASHRAE Services include:

Computer-simulated Fractionation Analysis is conducted by using the NIST’s Refleak Program for the standard required conditions.

Fractionation Validation testing for worst case formulation (WCF) that produces the worst case fractionated formulation (WCFF) to verify Refleak simulated results as required by Standard 34.

Flammability Testing Lower Flammable Limits (LFL) testing is conducted for the required number of conditions (WCFFs and WCF) per blend. The WCFF and WCF are tested at the temperatures and with equipment required by Standard 34. If needed, the LFL at 23oC will also be determined.

Leak/Recharge Testing is performed according to ASHRAE Standard and in the % filled (of max DOT fill) 1 Liter SS cylinder maintained at the required temperature. The blend is vapor leaked at the desired rate per hour to a % point of mass loss. Then, the cylinder is refilled with the blend that has the same liquid composition as the initial % filled liquid phase and another cycle of leakage follows and is repeated 5 times. A moderate mixing may be applied to the blend in the cylinder. A master cylinder filled to a % with the blend that has the same composition as the liquid phase of the initial % charge is prepared to facilitate a sequence of refills. The composition of liquid and vapor phase will be determined by Gas Chromatography (GC) at % mass loss initially and at each recharge cycle. The GC requires least two calibration mixtures.

Burning Velocity Measurement is performed following a guideline included in ASHRAE Standard 34-2010 (based on Jabbour publication). The test is conducted in a glass tube and an electrical spark is used to initiate the flammable gas/air mixture. A video camera is used to determine the burning velocity of the flammable gas/air mixture.

Burning Velocity of Refrigerant/Air testing is conducted with our burning velocity apparatus in customized vertical glass tubes, which is setup in a suitable location at our Laboratory, with temperature and atmospheric ambient conditions, and appropriate ventilation is in place in order to handle the material and its by-products safely. R32 refrigerant is used as reference material.

Preparation and Submission of Application, includes:

Toxicity Study – A 3-component Toxicity Section is prepared by our Toxicity Consultant, included in the application

Physical Characteristics - Compile and Calculate Required Physical Characteristics of the Refrigerant Blend and components.

Safety Data Sheet - DEKRA will prepare a basis for MSDS of your blend to be included in the application

We will prepare the application for consideration by the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE). The required number of hard copies and disks of the application will be submitted to ASHRAE for distribution to committee members.

ASHRAE Meeting Attendance

Our representative will attend either of the two biannual the ASHRAE conventions on the client’s behalf, to present the application.

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