摘要:
The invention relates to an apparatus for making a multilayer composite pipe. The multilayer composite pipe comprises an innermost layer (2) made of plastic. The pipe has a seamless metal layer (4) or a metal layer (4) having an axial, non-overlapping seam. The outer surface of the metal layer is treated for changing its outer appearance. There-after a transparent outermost layer (8) is provided on the outer surface of the metal layer. The structure of the pipe is such that the pipe can be permanently bent to certain angles without significant spring back.
摘要:
The present invention pertains to a process for lining a metal pipeline, said process comprising the following steps: (i) processing a thermoplastic polymer composition thereby providing a pipe liner having an outer diameter greater than the inner diameter of said metal pipeline, said thermoplastic polymer composition comprising, preferably consisting of: - at least one poly(aryl ether ketone) polymer [(PAEK) polymer], - at least one poly(phenylene sulfone) polymer [(PPSU) polymer], - optionally, at least one poly(arylene sulfide) [(PAS) polymer], and - optionally, at least one plasticizer; (ii) deforming said pipe liner thereby providing a deformed pipe liner having an outer diameter smaller than the inner diameter of said metal pipeline; (iii) inserting the deformed pipe liner in said metal pipeline; and (iv) expanding the deformed pipe liner to fit with the inner diameter of said metal pipeline. The present invention also relates to a pipeline system comprising at least two coaxial pipes, an outer metal pipeline and inner pipe comprising at least one layer comprising, preferably made of, said thermoplastic polymer composition.
摘要:
A pipeline system is enclosed including unlined or plastic lined pipes. A mechanical metal to metal connection is employed that can provide a fluid tight seal. A pipe coupling may be employed to span the connection. Plastic lined pipes can have their plastic liners connected to form a fluid tight bladder. Electro-fusion may be employed.
摘要:
The invention relates to a method for producing a multi-layer pipe line (1), in particular for transporting coolants in an air-conditioning system. Initially, a continuous inner layer (2) made of stainless steel having a layer thickness (s,) of at most 1 mm is provided. Then, the continuous inner layer (2) is coated, by means of an extrusion process, with a plastic layer (3) having a layer thickness (s a ) of preferably 7 mm at the most. The invention further relates to a correspondingly produced pipe line (1), and an air-conditioning system equipped with such a pipe line (1).
摘要:
Polyarylene sulfide compositions are described that exhibit high strength and flexibility. Methods for forming the polyarylene sulfide compositions are also described. Formation methods include dynamic vulcanization of a polyarylene sulfide composition that includes an impact modifier dispersed throughout the polyarylene sulfide. A crosslinking agent is combined with the other components of the composition following dispersal of the impact modifier throughout the composition. The crosslinking agent reacts with the impact modifier to form crosslinks within and among the polymer chains of the impact modifier. The compositions can exhibit excellent physical characteristics at extreme temperatures and can be used to form, e.g., tubular member such as pipes and hoses and fibers.