SAE J2842-2019 PDF

Full title and description

SAE J2842-2019 — "R-1234yf and R744 Design Criteria and Certification for OEM Mobile Air Conditioning Evaporator and Service Replacements". This SAE technical standard defines design criteria, test requirements, labeling and a certification framework for evaporators used in mobile air conditioning (MAC) systems that employ refrigerants R-1234yf (HFO-1234yf) and R-744 (carbon dioxide).

Abstract

SAE J2842 provides manufacturers, OEMs and certifying bodies with a consistent set of requirements and test procedures intended to ensure evaporator safety, mechanical integrity, corrosion/durability resistance and correct service/labeling practices when using the low‑GWP refrigerant R‑1234yf or the high‑pressure refrigerant R‑744. The standard also describes certification paths for non‑OEM replacement parts and clarifies exclusions (for example R‑134a and R‑152a are outside its primary scope).

General information

• Status: Revised / Current (2019 edition).
• Publication date: June 25, 2019 (2019 edition, product code J2842_201906).
• Publisher: SAE International.
• ICS / categories: Road vehicles / vehicle systems (ICS 43 family — vehicle engineering and MAC-related categories); relates to vehicle HVAC and refrigerant safety classifications.
• Edition / version: 2019 Edition (J2842_201906).
• Number of pages: 25 pages (2019 revision).

Scope

Defines minimum design criteria, required tests, labeling and a certification framework for OEM evaporators and service replacement evaporators used in mobile air conditioning systems that utilize R‑1234yf and R‑744 refrigerants. The standard is intended to be used by vehicle manufacturers, evaporator suppliers and independent test/certification bodies to minimize hazards associated with mildly flammable refrigerants (R‑1234yf) and high‑pressure refrigerants (R‑744). It also identifies refrigerants and cases excluded from this document (for example R‑134a systems are not the target of J2842; R‑152a is excluded due to secondary‑loop requirements).

Key topics and requirements

• Design criteria for evaporator mechanical integrity and pressure containment appropriate to R‑1234yf and R‑744 service conditions.
• Performance and durability testing requirements, including corrosion/durability checks and environmental exposure tests relevant to under‑dash or in‑vehicle locations.
• Leak and pressure testing, and guidance to limit leak pathways and ignition risk when using mildly flammable refrigerants.
• Labeling and service information requirements to prevent cross‑contamination and to inform service technicians about refrigerant type and safe servicing procedures.
• Certification procedures for non‑OEM replacement parts — references SAE J2911 for certification methodology and public posting of certified products.
• Explicit exclusions and applicability notes (e.g., R‑134a not targeted; R‑152a excluded except for secondary‑loop systems).

Typical use and users

Primary users are OEM vehicle manufacturers, evaporator and MAC component designers, aftermarket parts manufacturers, independent test laboratories and certification bodies, and fleet/service organizations that must ensure safe servicing and replacement of MAC evaporators for vehicles using R‑1234yf or R‑744. The standard is used to specify procurement requirements, guide design validation testing, and to underpin voluntary SAE certification claims.

Related standards

Key related SAE and international documents include SAE J639 (safety and design standards for motor vehicle refrigerant vapor compression systems), SAE J2911 (procedure for certification of MAC components and service training), and international MAC safety standards such as ISO 13043 and other refrigerant safety/systems guidance that address refrigerant classification and system safety. These documents are often used together when establishing vehicle‑level MAC safety and service requirements.

Keywords

SAE J2842, R‑1234yf, R‑744, CO2, evaporator, mobile air conditioning, MAC, OEM evaporator, service replacement, certification, J2911, J639, refrigerant safety, leak testing, durability, labeling.

FAQ

Q: What is this standard?

A: SAE J2842‑2019 is a technical standard that sets design, test, labeling and certification requirements for OEM and service replacement evaporators used with R‑1234yf and R‑744 in motor vehicle mobile air conditioning systems.

Q: What does it cover?

A: It covers required design criteria, mechanical and durability testing, leak and pressure considerations, labeling for service/recharge identification, and a certification framework (including reference to SAE J2911 for certification procedures). It also states which refrigerants or configurations are outside its scope (e.g., conventional R‑134a evaporators).

Q: Who typically uses it?

A: Vehicle OEMs, evaporator and HVAC component suppliers, aftermarket replacement manufacturers, test laboratories, certifying bodies, and service organizations/technicians concerned with safe design and servicing of MAC evaporators for R‑1234yf and R‑744 systems.

Q: Is it current or superseded?

A: The document is the 2019 edition (J2842_201906) and is listed as the current/revised edition (published June 25, 2019). Users should check SAE International for any subsequent revisions or corrigenda after 2019.

Q: Is it part of a series?

A: It is part of SAE’s interior climate control / mobile air conditioning standards family and is typically used alongside standards such as SAE J639 (MAC system safety) and SAE J2911 (certification procedures), as well as applicable international MAC/refrigerant safety standards.

Q: What are the key keywords?

A: R‑1234yf, R‑744, evaporator, MAC, OEM, certification, durability testing, leak testing, labeling, SAE J2842, SAE J2911, SAE J639.