Boiler Tube Plugs 1

[Bocephus50]

I keep getting conflicting information regarding acceptable material for boiler tube plugs. I find SA-36 plugs readily available, but some have said that plugs must be made of SA-105 and not SA-36. Anyone else being told this?

 

[metengr]

The material for boiler tube plugs can be any material that is permitted by Section I in Section II, Part D, Table 1A.

 

[MJCronin]

i have had good luck with these:

Consider expansion plugs (Torque'n seal) for your application. They have been around for a long time

http://www.tubeplug.com/highpressuretubeplugs.shtml

These wrench-actuated plugs work well in tight places where hammer driven plugs may not work.

They do, of course, cost a bit more.

Are you maintaining a tubesheet "plugging map" ? These become invaluable when evaluating the HX for future retube/replace decisions.

tell us more about the HX......

 

[rmw]

MJC,

You have plugged boilers with Torq-N-seals?

rmw

 

[chicopee]

is it for a firetube or watube boiler?

 

[Bocephus50]

I am referring to plugging tubes in watertube boilers, don't think I've seen anyone plug any tubes in firetube boilers.

Metengr....if using SA-s6 then one should perform a thickness calculation? Taperred plug could then be machined to assure at least the calculated thickness is driven into the tube or tubehole.

 

[metengr]

Pre-designed tapered plugs can be used directly provided the correct material is selected. There should be no need for calcs.