EN ISO 13757:1996 PDF

Name: EN ISO 13757:1996 — Liquefied petroleum gases - Determination of oily residues - High-temperature method (ISO 13757:1996)
SKU: EN ISO 13757:1996
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Liquefied petroleum gases - Determination of oily residues - High-temperature method (ISO 13757:1996)

Название (английский):

EN ISO 13757:1996

Liquefied petroleum gases - Determination of oily residues - High-temperature method (ISO 13757:1996)

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 9
Дата публикации:: 15 июля 1996 г.
Издание:: CEN EN 13757 edition 1 version 1
ICS:: 75.160.30

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Описание (английский):

La présente Norme internationale prescrit une procédure pour la détermination des résidus pouvant être contenus dans les gaz de pétrole liquéfiés (GPL), subsistant après évaporation à 105 °C. Ces résidus, dénommés «résidus huileux», correspondent à tous les produits piégés dans les systèmes de vaporisation qui sont susceptibles d'être soumis à un apport calorifique externe supérieur à l'évaporation ambiante.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

EN ISO 13757:1996 - Liquefied petroleum gases - Determination of oily residues - High‑temperature method specifies a laboratory method to determine oily residues in LPG (liquefied petroleum gases) remaining after evaporation at 105 °C. The procedure concentrates a filtered LPG sample by evaporation into dichloromethane (methylene chloride), removes solvent by rotary evaporation, dries the residue in an oven at 105 °C, and reports the oily residue as mg/kg LPG. The standard includes safety cautions for hazardous materials and equipment.

Key topics and technical requirements

Sample collection and mass: Typical sampled mass is 800–1 200 g LPG taken from a stainless steel sample cylinder with dip tube.

Solvent and reagents: Dichloromethane (analytical grade) is used as primary solvent (pentane may be substituted if regulatory/health restrictions apply, provided comparable residue performance). Other reagents include acetone, ammonium peroxodisulfate/sulfuric acid (for cleaning) and grade 3 water (ISO 3696).

Apparatus: stainless steel sampling lines and in-line filter; 5 dm3 shallow glass beaker; stainless steel cooling coil (coiled 3 mm tube); rotary evaporator (bath 65 °C ± 5 °C); evaporation flask (tare ≤ 130 g); oven at 105 °C ± 5 °C; cooling bath capable of −60 °C.

Procedure highlights:

Filter and collect LPG into a beaker containing ~50 cm3 dichloromethane.
Evaporate LPG, concentrate the soluble fraction, rinse and combine solvent washes into an evaporation flask.
Use rotary evaporation (no vacuum) to remove solvent, then oven‑dry residue at 105 °C for 1 hour, cool in a desiccator and weigh to nearest 0.1 mg.
Perform a blank test and apply blank correction to results.

Safety: Work in an explosion‑proof hood, ventilated fume hood for dichloromethane, earth equipment to prevent static ignition, wear appropriate PPE.

Performance: Interlaboratory precision reported for 70–100 mg/kg oily residues - repeatability r = 15 mg/kg; reproducibility R = 50 mg/kg.

Applications and users

Applications:

Quality control of LPG batches for downstream equipment (vaporizers, burners) where oily deposits can interfere with heat transfer or combustion.
Acceptance testing in LPG production, storage and distribution.
Investigations of deposit problems in vaporizer systems and safety/maintenance audits.

Who uses it:

Petroleum and LPG laboratories, quality assurance teams, refinery and distribution technical staff, standards laboratories, and independent test laboratories.

Related standards

ISO 3696:1987 - Water for analytical laboratory use (grade 3 water).

ISO 4257:1988 - LPG sampling methods.

The standard was prepared by ISO/TC 28 (Petroleum products and lubricants) and includes an informative annex.

Keywords: EN ISO 13757:1996, liquefied petroleum gases, LPG oily residues, high‑temperature method, dichloromethane, rotary evaporator, oven drying, sampling, test precision.

EN ISO 13757:1996 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications and users

Related standards

Технические детали

ISO 13757:1996

Liquefied petroleum gases — Determination of oily residues — High-temperature method

ISO 3696:1987

Water for analytical laboratory use — Specification and test methods

ISO 4257:1988

Liquefied petroleum gases — Method of sampling

SIST EN ISO 3696:1998

Water for analytical laboratory use - Specification and test methods (ISO 3696:1987)