Hot tapping is a process of cutting holes into pipe, tanks, or any pressurized vessel without interrupting system function and with no release or loss of product. Hot taps permit new tie-ins to existing systems, the insertion of devices into the flow stream, permanent or temporary bypasses, and are the preparatory stage for line plugging. We are currently equipped for hot tapping: 1/2" thru 48" in size. 1500 PSIG Maximum working pressure @ 100° F. 750° F. Maximum temperature @ 700 PSIG.
Information we require for hot tapping: Size of valve through which hot tap will be done. Is the valve screwed or flanged? ANSI rating? Nominal size, wall thickness, and material of the line to be tapped. Product in the line. Operating pressure and temperature. "A" dimension. Before welding please request our dimensional brochure, or confer with Topaz.

Angle hot tapping:
This procedure refers to any hot tap where the centerline of the tapping nozzle is not perpendicular to the surface being tapped. Before welding, contact Topaz to discuss degree of angulation and the possible need for a centering device to stabilize the pilot drill. We are currently equipped to perform angle taps in sizes 1" through 24", as much as 45° off perpendicular, and into the heel of short or long radius ells.

Tapping blind flanges and heavy-wall vessels:
Hot tapping heavy-wall vessels and blind flanges is not a problem, provided special issues are addressed in the design of the branch connection. Please consult Topaz prior to welding to discuss these considerations.

Tapping materials other than carbon steel:
In addition to carbon steel, we commonly tap cement lined pipe, transite, cast iron, stainless steel and other alloys, plastic and fiberglass. Although we tap these materials frequently, additional information such as the thickness and composition of linings, hardness of alloys, or type of fitting and valve through which we will be operating may be needed to insure that proper equipment is provided for your job.

Tapping materials that can not be welded:
If it is necessary to tap or plug a line that cannot be welded, such as cast iron, transite, or even carbon steel in an area where welding is not permitted, a bolt-on tapping or plugging fitting can be provided. Topaz offers mechanical fittings by several quality manufacturers, giving us the latitude to provide the right fitting at the right price and delivery for your job. If a standard product does not suit your application, one can be custom fabricated that will meet your needs.