piping failures
piping failures
(OP)
What are the types of failures encountered in Piping?
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RE: piping failures
Same, copper tube.
Transverse complete fracture of nylon vacuum tube from age and/or vibration.
Perforation of steel brake line by external corrosion.
Perforation of steel hydraulic component by internal localized corrosion from a single drop of water in silicone hydraulic fluid.
...
Mike Halloran
Pembroke Pines, FL, USA
RE: piping failures
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RE: piping failures
Too many to list.
Here are some buzz words and acronyms to Google:
* HIC
* SOHIC
* SSCC
* temperature embrittlement
* chloride stress cracking
* nil ductility temperature
* erosion
* energy stored in compressed gas
* effects of prolonged exposure of steel to temperatures above 775 F
* creep damage
* cyclic loading and fatigue
* cathodic protection / galvanic corrosion
* effect of hydrogen sulphide on yellow metals
* piping flexibility and expansion
However, if one was to put a more academic spin on your question, you could probably categorize "types of failure encounterd in piping" this way:
* temperature related failures
* stress related failures
* chemical attack related failures
* electro-chemical related failures
or this way:
* failure due to bending
* failure due to hoop stress
* failure due to tension
* failure due to compressive stress / load (e.g. buckling)
* failure due to torsion
* failure due to shear
* failure due to impact
* failure due to excitation at natural frequency
The more I think about what might be a good answer, the more I think the question needs to be a bit more specific.
Regards,
SNORGY.
RE: piping failures
David
RE: piping failures
failure due to use of incompatible fittings (taper into parallel is a favourite)
failure due to incorrect assembly of the fittings.
A.
RE: piping failures
That is why Clients are adamant and willing to invest in the money it takes for the engineer to prepare accurate underground as-builts.
Ooops...sorry...that might have sounded bitter...
Regards,
SNORGY.
RE: piping failures
RE: piping failures
It looks really weird at site there.
Controlvalves hanging 5 mtrs in the air, e-w and n-s 'pipebridges'(6"pipestands) at the same elevations
Hope it doesn't explode there.
RE: piping failures
When the general public (bless their hearts) has access to rubber-tired-hoes or bull dozers and doesn't feel a need to check before they dig, perfect as-builts can be worthless. I had it so bad in one field that I developed an ArcVIEW script to allow me to click on any pipe segment and it would give me an automatic isolation list--I used it about once a quarter.
David
RE: piping failures
Answer : 1. Catastrophic Failure 2. Fatigue Failure I guess that's about as general as you can get EH?
RE: piping failures
jt