Main turbo pipe on what ? 2.0 TDi perhaps in which case there isn't a main Turbo Pipe. There is a boost hose from the turbo which goes to an ally pipe, which then connects to a boost hose to the inter cooler, there is then a boost hose that connects from the inter cooler to a plastic pipe. This in turn connects to a boost hose which connects to the EGR valve.
Forge do replacement boost hoses for all of then except the first one at the turbo end, which is currently in development.
Paul