A piping component that includes (i) a piping body with an open end; and (ii) an alloy comprising (by weight percentage) 12% to 16.5% zinc, 0.265% to 1.6% silicon and sufficient copper so that the sum of the weight percentages of the zinc, silicon, and copper in the alloy is at least 99.7%. The alloy exhibits an elongation that is within a range of 60% to 70%. Additionally discloses is a piping component including (i) a piping body with an open end; and (ii) a cold worked alloy comprising (by weight percentage) 12% to 16.5% zinc, 0.265% to 1.8% silicon and sufficient copper so that the sum of the weight percentages of the zinc, silicon, and copper in the alloy is at least 99.7%. In embodiments, the weight percentage of the silicon in the alloys disclosed can be 0.5% to 1.6%, 0.5% to 1.8%, or 0.5% to 2.0%.

A piping component that includes (i) a piping body with an open end; and (ii) an alloy comprising (by weight percentage) 12% to 16.5% zinc, 0.265% to 1.6% silicon and sufficient copper so that the sum of the weight percentages of the zinc, silicon, and copper in the alloy is at least 99.7%. The alloy exhibits an elongation that is within a range of 60% to 70%. Additionally discloses is a piping component including (i) a piping body with an open end; and (ii) a cold worked alloy comprising (by weight percentage) 12% to 16.5% zinc, 0.265% to 1.8% silicon and sufficient copper so that the sum of the weight percentages of the zinc, silicon, and copper in the alloy is at least 99.7%. In embodiments, the weight percentage of the silicon in the alloys disclosed can be 0.5% to 1.6%, 0.5% to 1.8%, or 0.5% to 2.0%.

An integrity monitoring system for a lined pipeline is provided for monitoring the integrity of a polymer liner in a host pipe. Methods and apparatus are described by which a lined pipeline is provided with such an integrity monitoring system. Sensor cable is able to bridge a joint between sections at lined pipe, for example by routing the sensor cable across the joint via a channel in an electrofusion fitting or by connecting successive lengths of sensor cable via pass-throughs in an electrofusion fitting. Advantageously, the sensor cable is disposed within a continuous annulus between linings and host pipes, and the continuous annulus is maintained across pipe joints using electrofusion fittings.

A double skinned feed or scavenge pipe assembly comprises; an inner pipe (22) and an outer pipe (23) enclosing the inner pipe and defining an annular space (24) between the inner pipe and the outer pipe and a sleeve (28) configured to slip over the outer pipe (23). Complementary threads (29) are provided on an outer wall of the outer pipe (23) and an inner wall of the sleeve (28). A lock, for example in the form of a locking nut (31) is positioned over the outer pipe (23) when the complementary threads (29) of the outer pipe and sleeve are engaged. The configuration of the assembly is such that, in use, the sleeve (28) is slidable between a first position where the inner pipe (22) is accessible and a second position wherein the inner pipe (22) is completely enclosed.

A double skinned feed or scavenge pipe assembly comprises; an inner pipe (22) and an outer pipe (23) enclosing the inner pipe and defining an annular space (24) between the inner pipe and the outer pipe and a sleeve (28) configured to slip over the outer pipe (23). Complementary threads (29) are provided on an outer wall of the outer pipe (23) and an inner wall of the sleeve (28). A lock, for example in the form of a locking nut (31) is positioned over the outer pipe (23) when the complementary threads (29) of the outer pipe and sleeve are engaged. The configuration of the assembly is such that, in use, the sleeve (28) is slidable between a first position where the inner pipe (22) is accessible and a second position wherein the inner pipe (22) is completely enclosed.

A pipeline construction usable for internally insulating a welded joint between pipes with an internal protective coating. A device for internally insulating a welded pipeline joint includes a sealing assembly including a cylindrical housing and a coaxially-fastened cylindrical working member that radially expands upon generation of excess pressure in a cavity thereof. Inside the housing are a sealing compound feed assembly, a dosing device formed by a piston assembly for sealing compound components, and a pneumatic control assembly. In the dosing device, working cavities for each component are connected to the feed assembly. The elastic working member has a conduit connected to the feed assembly for feeding sealing compound into an annular gap in a welded joint region, and a conduit for pumping air out of the gap. The pneumatic control assembly controls dosing device and feed assembly functioning and generates excess air pressure in the working member cavity.

A sleeve is provided for covering a pipe joint formed between two pipes that are coupled to one another to form a tube. The sleeve comprises a heat-shrinkable material that is configured to conform to the first and second pipes when heated to cover the pipe joint.

A joint structure includes a first sheet member, a second sheet member, a third sheet member, and plural joining parts formed at locations where the first sheet member, the second sheet member, and the third sheet member overlap, so as to join the first sheet member, the second sheet member, and the third sheet member together. The plural joining parts are formed at an interval along an edge of the first sheet member and an edge of the second sheet member. The third sheet member includes a fold-back portion provided at least between the plural joining parts by folding the third sheet member back around the edge of the first sheet member and the edge of the second sheet member such that the fold-back portion is disposed on an opposite side of the first sheet member from a side overlapped with the second sheet member.

A joint structure includes a first sheet member, a second sheet member, a third sheet member, and plural joining parts formed at locations where the first sheet member, the second sheet member, and the third sheet member overlap, so as to join the first sheet member, the second sheet member, and the third sheet member together. The plural joining parts are formed at an interval along an edge of the first sheet member and an edge of the second sheet member. The third sheet member includes a fold-back portion provided at least between the plural joining parts by folding the third sheet member back around the edge of the first sheet member and the edge of the second sheet member such that the fold-back portion is disposed on an opposite side of the first sheet member from a side overlapped with the second sheet member.

A tube assembly includes at least first and second tubes configured for coupling at respective ends. The first and second tubes each include a base material, and a weld interface at the respective end. The weld interface is proximate to an inner diameter and an outer diameter of the first and second tubes, and includes a weld interface segment extending therebetween. A work hardened weld assembly couples the base material of each of the first and second tubes. The work hardened weld assembly includes a weld fusion zone between the weld interfaces of the first and second tubes and the weld interface segments of the first and second tubes. The weld fusion zone is work hardened and at least the weld interface segments of the first and second tubes are work hardened between the work hardened weld fusion zone and the base material of the first and second tubes.