The "Quality" culture in Pearl CNG Cylinder Testing company is originated with the establishment of The Company, The quality is controlled by the settlement of our company. This culture derives, in particular, from the market in which The Company operates and has always operated, thereby developing the "Quality" Concept over time. This development has been gradual and constant starting from the simple quality control of the product until reaching the awareness of the need for a complete Company Quality System for any customer .
DESIGN, APPROVAL, AND TESTING OF PEARL CNG CYLINDER TESTING COMPANY
Pearl CNG Cylinder Testing Company. comply with the most stringent specifications set down by International Bodies and Local Authorities. All over the India Our Company is well known for the comprehensive range of safety and standard approvals of its cylinders. A list of Ours Approvals is available.
REFERENCES
1. The design of Pearl CNG Cylinder Testing company uses not only specified calculation formulae but also finite element analysis . The calculated data are then verified/confirmed experimentally, using a number of techniques which include strain-gauge measurements.
2. After verifying the chemical, physical, mechanical characteristics and, where necessary, its stress-corrosion resistance; the candidate materials are all carefully selected depending on the eventual use conditions of the proposed cylinder.
3. We also undertake a fracture mechanics analysis of the steel for major safety, which allows us to define the maximum permissible defect size in the cylinders, in order to enable us:
- to establish the limits of the non-destructive test which should be undertaken in the production line
- to guarantee the cylinders fatigue life
- to demonstrate that a leak precedes the hypothetical burst of the cylinder (LBB)
4. The cylinders surface protection is considered to be a function of the various environmental conditions of use and of the various corrosion agents which the cylinder may come into contact with
APPROVAL
Our design tests and analyses are undertaken by an independent organization such as a Notified Body/Independent Inspection Agency, for every new cylinder design at us, in order to gain the necessary approvals. All the test work necessary to gain the approvals, as stipulated in the relevant specification, is conducted at Pearl CNG Cylinder Testing Company. using own equipment and facilities. Such tests include, apart from the conventional mechanical test and fatigue/burst testing, advanced tests on full scale cylinders such as environmental testing, extreme temperature tests, flawed burst tests, bonfire/high-velocity impact tests , gaseous pressure cycling test etc. Additionally a number of material tests such as Sulphide Stress Cracking, compatibility and fatigue crack growth propagation under gaseous hydrogen bar are performed.
TESTING
Apart from the prototype test regime regular tests have to be performed to satisfy the requirements of the standards/regulations. Often referred to as batch/production tests, these comprise:
ON MATERIALS
- Mechanical tests: strength, elongation, Charpy impact, toughness, stress-cracking
- Chemical analysis on prototype cylinders (check of safety performance)
ON PRODUCTION
During production depending on the nature of the standard being applied, cylinders are subjected to:
- Hardness test
- Ultrasonic examination (for detection of imperfections and wall thickness measurement)
- Hydraulic test (proof or volumetric expansion) test
- Leak test on the base of tube spun cylinders
- Check the critical dimensions and of the neck threads
- Check the stamp markings
- Check the specified internal and external surface finishing
- Flawed cylinder burst-test
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