Methods for joining insulated pipe lengths
Transfer molding insulation unit
Method for sealing pipe joints
Mechanical protection coating for coated metal substrate
Process and apparatus for injection molding tire treads Patent #: 4604256
ApplicationNo. 06/888489 filed on 07/23/1986
US Classes:405/169, With assembling of line structure138/155, JOINED SECTIONS138/97, REPAIRING249/90, Mold supported by and girdles preform249/95, Split mold clamps and supports preform264/256, Utilizing clay, sand, or calcareous slurry264/263, To unite independent contacting preforms264/271.1, Preform embedded in or surrounded by shaped material264/35, Uniting preform member with molding material264/36.16, Pipes or tubes285/47, Insulated405/158, Submerging, raising, or manipulating line of pipe or cable in or from marine environment425/544Means for transfer molding
ExaminersPrimary: Corbin, David H.
Attorney, Agent or Firm
International ClassesF16L 13/02 (20060101)
F16L 13/00 (20060101)
B29D 23/00 (20060101)
B28B 21/74 (20060101)
B28B 21/00 (20060101)
Foreign Application Priority Data1985-07-23 GB
AbstractIn the progressive forming and laying of an undersea pipeline the welded joints between the ends of pipes pre-coated with a corrosion protection coating and an outer concrete weighting coating are protected by a mastic coating applied by clamping a mould around the pipeline joint to form a cavity between the joint and the mould, filling the cavity with mastic by forcing into it under pressure a charge of mastic at a temperature of not more than 70° C., releasing the pressure and opening and removing the mould. The mastic coating is applied up to the level of the concrete coating adjacent the joint.