Brochure

Gastite Division, Titeflex Corporation
1116 Vaughn Parkway / Portland, TN 37148
800.662.0208 / www.gastite.com / [e-mail]
72
April 2015
Section 5: Inspection, Repair and Replacement
5.3 Repair of Damaged CSST
5.3.1 Determine Damage
Crushed, dented or kinked tubing may result in restricted flow conditions. Use the following guidelines to determine the
severity of damage and whether repair or replacement is necessary.
a) FlashShield™ CSST gas tubing must be repaired if damaged by puncture of any kind, e.g. nails, screws, drill bits, etc.
b) No repairs or replacement of the tubing is necessary if the FlashShield™ CSST tubing is only slightly dented due to impact
or crushing and the overall crush depth is less than 1/3 the diameter of the tubing. Minimal flow reduction will occur at
this limited damage level.
c) Repair or replacement is necessary if the overall crush depth is greater than 1/3 the diameter of the tubing. Restricted flow
may occur at this damage level.
d) FlashShield™ CSST tubing bent beyond its minimum bend radius so that a crease or kink remains must be repaired.
Restricted flow may occur at this damage level.
5.3.2 Method of Repair
A line splice can be made, but if the tubing run is short and easily accessible, the preferred repair method is to replace the
entire length. Often, a tubing run can be replaced faster than repairing the damaged section. e FlashShield™ mechanical
joint fittings can be removed and easily re-attached. is is the preferred method because it does not add any additional
fitting joints to the system.
Where repairs or replacements involve only the FlashShield™ CSST, the tubing can be joined with standard pipe couplings
or FlashShield™ CSST coupling (Fig. 5-1).
Where repairs or replacements involve CSST systems of different manufacturers, the systems can be joined through standard
pipe couplings and each manufacturer’s recommended CSST fitting (Fig. 5-2).
5.3.3 FlashShield™ Jacket Repair
Scuffing, scraping, or tearing of the outer polymer jacket layer may occur during installation. Within limits this condition
will not affect the performance of Flashshield™ CSST as long as the middle layer (metallic shield) and the bottom layer (semi-
conductive polyethylene) remain in normal condition.
If a tear in the outer jacket is greater than 1/2" in length, Gastite recommends wrapping the tear area with electrical tape
or self-bonding silicone tape, to provide continued protection to the metal shield layer. If the metal shield layer tears for a
length great than 1/2", the affected area must be cut out and replaced using appropriate methods. If the affected area (of
greater than 1/2" metal shield tear length) cannot be cut out and replaced, the FlashShield CSST system shall be treated
like a yellow Gastite CSST system with regard to Gastite yellow CSST isolation/separation requirements (Gastite® D&I
Guide sec. 4.3), and direct-bonding (Gastite® D&I Guide sec. 4.10).
Fig. 5-1
Fig. 5-2