How Your
Faber Cylinders Are Designed,
Approved and Tested
Faber Diving Cylinders
comply with the most stringent specifications set down by International
Bodies and Local Authorities.
All over the world Faber is well known for the comprehensive range of
safety and standard approvals of its Diving Cylinders.
A list ofFaber Approvals for all types of cylinders is available.
Following you will find an introduction to the design,
the approval and the production tests
of Faber Diving Cylinders.
1. The design of Faber cylinders uses not only specified
calculation formulae but also the finite element linear analysis. The calculated
data are then verified experimentally using strain-gauge measurements.
2. The material (steel plates) is carefully selected depending on their
eventual use conditions, after verifying the chemical, physical, mechanical
characteristics.
3 The fracture mechanics analysis of the steel allows us to define the maximum
permissible defects in the cylinders, in order to enable us:
- to establish the non-destructive tests in the production line
- to guarantee the product 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.
5 - Faber cylinders are manufactured according to a quality control program
certified to ISO 9001.
Design Tests and Analyses
are performed for new design approvals of diving cylinders:
- On materials
- Mechanical tests: tensile, elongation, impact,
toughness, ductility, stress-cracking
- Chemical analysis
- On prototype cylinders (check of safety performances)
- Hydraulic burst test
- Pressure cycling test
- Ductility and impact resistance test
- Environmental test
- Extreme temperatures monotonic and cycling tests
- Flawed cylinder burst test
During production all the cylinders are subject to:
- Hardness test
- Ultrasonic inspection
- Hydraulic (proof and volumetric expansion) if
required by the standard tests
- Leak test on spun cylinders
- Check of the critical dimensions and of the threads
- Check of the marking
- Check of the specified internal and external surface
finish
- Flawed cylinders burst-test
For a complete description of the manufacturing processes please go to
Production Cycles |