LPG: Copper Corrosion by LPG • Density of LPG and of Light Hydrocarbons • Gage Vapour Pressure of LPG • Hydrogen Sulfide in LPG • LPG Relative Purity • Sampling and Gauging

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LPG Relative Purity

ASTM D1837 - ASTM D2158
IP 317

ASTM D1837 - Volatility of Liquefied Petroleum (LP) Gases
This test method is a measure of the relative purity of the various types of liquefied petroleum (LP) gases and helps to ensure suitable volatility performance. The test results, when properly related to vapour pressure and density of the product, can be used to indicate the presence of butane and heavier components in propane type LP-gas, and pentane and heavier components in propane-butane and butane type fuels. The presence of hydrocarbon compounds less volatile than those of which the LP-gas is primarily composed is indicated by an increase in the 95 % evaporated temperature.

ASTM D2158 - IP 317 - Residues in Liquefied Petroleum (LP) Gases
This test method covers the determination of the extraneous materials weathering above 38°C that are present in liquefied petroleum gases.

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LT/WT-170000/M

Volatility and Residue in Liquefied Petroleum (LP) Gases

• Bath composed by twin wall stainless steel tubes with insulation material.
• Copper cooling coil, 6 meters wound to a diameter of 63.5mm, total length of approx. 285 mm with Ni-Cr treatment.
• Equipped with two ¼”” valves.

Accessories for ASTM D1837

• 1573: cone-shaped tube 100 ml, 203 mm, graduated for ASTM D1837, pack of 4 pcs.
• 1000336 - water bath:
  • bath made in stainless steel with water inlet and outlet connection;
  • thermometer central support for monitoring the temperature;
  • 8 positions cone-shaped support for right immersion at depth of 38 mm;
  • mandatory connection to external water conditioning source.
• T-AS99C: thermometer ASTM 99C.
• T-AS99F: thermometer ASTM 99F.
• 7458: thermometer armour.
• LAB-101-225/TH: cork with hole for thermometer.
• 7087: syringe 1ml capacity div. 0.1 with needle L = 200 mm.
• 7362: blue watertight PVC gloves with 100% knitted woven cotton liner underneath.
• 5511 - device for dry ice, used for produce dry ice flakes or semi-compact block:
  • stainless steel spread trumpet;
  • manometer for pressure monitoring and gas cylinder Eu thread valve DIN 477 w 21.8 × 1/14” ;
  • plastic ring for hold the receiving bag;
  • receiving bag 500 g and 1000 g supplied;
  • the apparatus is not supplied with gas for ice production, this apparatus must be connected to a cylinder with CO2 (liquefied with internal siphon).

Accessories for ASTM D2158-IP317

• 2104: cone-shaped tube 100 ml, 203 mm, graduated to 0.05 ml, pack of 4 pcs.
• 7087: syringe 1 ml capacity, div. 0.1, needle L = 200 mm.
• T-AS5C: thermometer ASTM 5C - IP 1C.
• T-AS6C: thermometer ASTM 6C - IP 2C.
• T-AS57C: thermometer ASTM 57C.
• 7034: filter paper medium degree, ∅ 125 mm, pack of 100 pcs.
• 1000463: heating water bath 220 Vac with cooling serpentine
  and joint for external cooling source connection.
• 5798: copper wire 1.5 mm, L = 300 mm.
• 5797: support with axle and clamp.
• 5551: rack for cone-shaped tube, 4 position.
• 1000462 - laboratory solvent dispenser:
  • wash capacity up to 1 lt.;
  • filter container made in stainless steel 25 mm diameter;
  • pack of 100 pcs. filter 0.45 µm, 25 mm diameter (P/n 5237);
  • borosilicated glass flask;
  • PTFE High quality seal.

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