tests, measurement, analyses

Certification tests of LPG and CNG

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We offer:

  • Hydrostatic pressure tests 
    • Pressure vessel tests 
    • Destructive tests up to a pressure of 300 MPa 
    • Residual strength tests 
    • Tests of heat exchangers, evaporators and condensers
    • Metal as well as composite hydraulic member tests 
    • Brake tube tests 
    • Hydraulic hose tests 
  • Hydrodynamic pressure tests 
    • Pulsed pressure tests of heat exchangers, evaporators and condensers
    • Cyclic stress tests of break tubes 
    • Cyclic stress tests of hoses 
  • Temperature and humidity tests 
    • Tests of devices at extreme temperatures (-70 to 180 deg. C) and relative humidity from 10% to 95% up to dimensions 1000 x 1000 x 2500 mm 
  • LPG / CNG component tests 
    • Homologation tests of systems and components for LPG and CNG alternative fuelling of cars accor­ding to ECE Regulation No. 67.01, ECE Regulation No. 110 and standards ISO 15500

 

Equipment (selection):

  • 300 MPa static pressure sources 
  • Dynamic pressure sources for cyclic load up to 45 MPa 
  • Climatic chamber for temperature and humidity tests 
  • Standards for pressure gauges calibration

 

Standards (most frequent types of test - hydraulics):

ČSN EN ISO 6803 Rubber or plastics hoses and hose assemblies - Hydraulicpressure impulse test without flexing (ISO 6803:2008)
ČSN EN ISO 1402 Rubber and plastics hoses and hose assemblies - Hydrostatic testing
ČSN 11 9008 Hydrostatic machinery. General testing methods
ČSN EN 378-2 Refrigerating systems and heat pumps - Safety and environmental requirements - Parts 2: Design, construction, testing, marking and documentation
ČSN EN 13322-1 Transportable gas cylinders - Refillable welded steel gas cylinders - Design and construction - Part 1: Carbon steel
ČSN EN 13322-2 Transportable gas cylinders - Refillable welded steel gas cylinders - Design and construction - Part 2: Stainless steel
ISO 4038

Road vehicles - Hydraulic braking systems - Simple flare pipes, tapped holes, male fittings and hose end fittings

ISO 7241-2 Hydraulic fluid power - Quick-action couplings - Part 2: Test methods
ISO 15500 Road vehicles - Compressed natural gas (CNG) fuel systém components
ECE Regulation No. 67.01 Uniform provisions concerning the approval of: I. Approval of specific equipment of vehicles of category M and N using liquefied petroleum gases in their propulsion system II. Approval of vehicles of category M and N fitted with specific equipment for the use of liquefied petroleum gases in their propulsion system with regard to the installation of such equipment
ECE Regulation No. 110 Uniform provisions concerning the approval of: I. Specific components of motor vehicles using compressed natural gas (CNG) in their propulsion system; II. Vehicles with regard to the installation of specific components of an approved type for the use of compressed natural gas (CNG) in their propulsion system
 

Customers:

  • Pressure vessels makers 
  • Hose and brake tube makers 
  • Air conditioner for car manufacturers
  • LPG / CNG components makers 
  • Manufacturers, vendors and users of pressure gauges
  • Certification tests of LPG and CNG

 

Contact:

Ing. Miroslav Valeš, Ph.D.
director of VZLU TEST, a.s.
Tel: +420 225 115 267, +420 724 966 830,  fax: +420 225 115 430
e-mail: vales@vzlutest.cz
 

Ing. Jindřich Žďánský
Head of Hydraulics Testing Laboratory
Tel: +420 225 115 221, +420 602 385 074, fax: +420 225 115 430
e-mail: zdansky@vzlutest.cz