GB/T 18826-20161,1,1,2-Tetrafluoroethane(HFC-134a) for industrial use (English PDF)

GB/T 18826-2016 is the English-translated version of 工业用1,1,1,2-四氟乙烷（HFC-134a）.

GB/T 18826-2016 governs industrial 1,1,1,2-tetrafluoroethane, also designated HFC-134a or R134a, and fixes its requirements, test methods, inspection rules, marking, packaging, transport and storage as well as safety.

Clause 1 states that it applies to industrial 1,1,1,2-tetrafluoroethane and records the molecular formula C2H2F4 and a relative molecular mass of 102.04 based on the 2011 international relative atomic masses.

Clause 3 sets the requirements, describing the product as a colourless transparent liquid free of visible solid particles and placing the numerical specification in Table 1.

The foreword shows how that specification changed from the previous edition, with a halogenated unsaturated hydrocarbon index added for the superior grade and set at 0.0040 %, the 1,1,1,2-tetrafluoroethane mass fraction restated from 99.9 % to 99.90 % and the evaporation residue tightened from 0.01 % to 0.005 % for that grade, while for the qualified grade the content was restated from 99.5 % to 99.50 % and the moisture index tightened from 0.005 % to 0.001 %.

The same foreword records that the test method for the properties ("traits") was modified, that the chromatographic operating conditions, the quantification method and the typical chromatograms used to determine the tetrafluoroethane content were reworked together with Appendix A, that the test methods for moisture, chloride and non-condensable gases now refer to general method standards, that type inspection and factory inspection were revised, and that a safety chapter was added as clause 7.

Its normative references include GB 190 and GB/T 191 on dangerous goods and packaging marks, GB/T 601 and GB/T 603 on reagent solutions, GB/T 6681-2003 on sampling gaseous chemical products, GB/T 7373-2006, GB/T 7376-2008 on trace moisture in industrial fluorinated methanes, GB/T 8170 on rounding and limit values, GB/T 9722 on gas chromatography reagents, GB 14193 on filling liquefied gas cylinders, GB/T 31401-2015 on chloride determination and TSG R4002 on filling permits for mobile pressure vessels.

It was proposed by the China Petroleum and Chemical Industry Association, is administered by the Organic Chemical Subcommittee of the National Chemical Standardization Technical Committee as SAC/TC63/SC9, and falls under ICS 71.080.20 and Chinese standard class G17, with Zhejiang Quhua Fluorine Chemical Co., Ltd. among its main drafting units.

It replaces GB/T 18826-2002, the first edition of 2002, was issued on 2016-10-13 and has applied since 2017-05-01.

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

GB/T 37994-2019|GB/T 37999-2019|GB/T 38100-2019|GB/T 36692-2018|GB/T 36765-2018|GB/T 34237-2017

1. 1

   Add to cart

   Click "Download PDF" on this page and choose "Buy this standard". You can add more standards before checkout.

2. 2

   Checkout

   Enter your email and billing details. Payment is processed securely by Stripe (cards or bank transfer). Prefer bank details? Request a quotation (min. order $300).

3. 3

   Instant delivery (0–9 sec)

   Delivery is automatic: within seconds of payment you'll receive an email with a secure download link. The link stays valid for 72 hours.

4. 4

   Invoice included

   A tax invoice is attached to the confirmation email. Need a custom invoice? Contact us.