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We try to keep a stock of the more commonly used pigs and darts, but because
of the changing nature of demands this is not always practicable. For the
burst disc darts and shear pigs we therefore keep a number of discs, bodies,
noses and raw materials in ready access. We can usually supply a few within
a few days. It is, however, not wise to rely on instant manufacture. The
now standard high temperature versions cannot be produced quickly because
of the nature of the materials; it is essential to plan ahead.
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We formerly produced cement darts in the old materials quickly, but properties
are inferior; those who used them tended to re-experience (and it has happened)
all the reasons why we upgraded. If, however, you have an imminent blowout
and need a rupturable plug urgently as part of the solution, then we could
sometimes supply these (and it has been done) within hours in the middle
of the night. We no longer stock the old materials, but to compensate
usually now have a few darts available in made up form, so it is
still worth asking us.
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