circumfrencial weld is sometimes referred to as Girth weld. its just another term.
Flush Joint Wash Pipe - used in the oilfield on thin-wall 'Wash Pipe' used in 'fishing' operations - retrieval of broken tools from an well.
The same that is used above ground. Sweat fitting coupler. I would not use copper underground in an area that has winter.
A wrapped tap joint is a method of connecting a smaller branch pipe to a larger main pipe by wrapping the smaller pipe onto the larger one using welding techniques. This joint is often used in pipeline construction to create a secure and leak-proof connection between pipes of different sizes.
It was Mr Dunlop who used a hose pipe joint at the end for his sons cycle.
Use only black pipe
This is a good indication that you have a hole in your sewer line. It could be from root intrusion via a bad joint. It could be a bad joint. Perhaps a collapsed line due to the pipe material itself. Some older homes used a sewer material called orangeberg which was discontinued because it was structural unstable and prone to all sorts of problems.
A mechanical joint fitting, often used for connecting plain end ductile iron pipe to HDPE.
Coated Copper Pipe that is approved for underground only.
a pipe line dumby
pleasure
Teflon tape can be used on any type of liquid joint. However, it is strictly speaking a lubricant, NOT a sealant, and is a cheap and nasty way of sealing joints. - The proper sealant for any liquid pipe joint is a pipe joint compound such as Whitlam's or Oatey's Blue Joint Compound.