30 CFR § 33.9
Certification of dust-collecting systems.
Manufacturers of dust-collecting systems that are designed for integral use
on machines with drilling equipment may apply to MSHA to issue a certificate
of performance for such systems. To qualify for a certificate of
performance, the dust-collecting system shall have met satisfactorily the
test requirements of Subpart C under specified operating conditions, such as
type of drilling equipment, drilling speed, and power requirements and the
construction thereof shall be adequately covered by specifications and
drawings officially recorded and filed with MSHA. Individual parts of
dust-collecting systems will not be certified for performance. Certificates
of performance may be cited to fabricators of combination units as evidence
that further inspection and testing of the dust-collecting system will not
be required, provided the dust-collecting requirements of the drilling
equipment do not exceed the limits of performance for which the system was
certified. Since MSHA does not sanction the use of the words "permissible"
or "approved" except as applying to completely assembled equipment,
dust-collecting systems, which have been certified only as to performance,
shall not be advertised or labeled in a manner inferring that such systems
themselves are permissible or approved by MSHA. However, a certified system
may be advertised as suitable for use on combination units for which
certification may be desired if the limits of its performance are cited.
Certified dust-collecting systems shall bear labels or tags which shall
contain the following: "Performance-tested Dust Collecting, System, MSHA
File No. P/T______," and name of manufacturer, identifying numbers of the
dust-collector parts, and description of the limitations for which
performance is certified. MSHA will assign a P/T file number in the
certification letter.