摘要:
A roller tool for forming circumferential grooves around a pipe is disclosed. The tool is rotatable about an axis of rotation and has a circumferential surface engageable with a pipe. The tool surface includes first and second surface portions positioned in spaced relation and oriented perpendicularly to the axis of rotation. A radial surface portion extends between the first and second a surface portions and is oriented substantially parallel to the axis of rotation. An angled surface portion is positioned adjacent to the second surface portion. The angled surface portion is oriented at an angle up to about 70° and slopes away from the second surface portion.
摘要:
A valve assembly for insertion in a line formed by an existing pipe of predetermined outside diameter containing fluid under pressure i ncludes a valve b ody with a bonnet-supporting flange that defines an access way into the valve body through which an installer can cut and remove a section of the existing pipe. A bonnet with a moveable gate having a width no less than the predetermined outside diameter of the pipe, includes a flange-mating portion that fits into the access way in a fluid-tight fit while defining a gate opening through which the gate moves into the valve body to a closed position in which the gate extends through the gate-receiving gap in the pipe and into fluid-tight engagement of the valve body. Installation is accomplished by (i) assembling the valve body over the existing pipe, (ii) mounting a temporary isolation valve on the bonnet-supporting flange, (iii) cutting and removing a section of the existing pipe through the isolation valve to form the gate-receiving gap in the pipe (iv) installing the bonnet through the isolation valve, and then (v) removing the isolation value up over the bonnet.
摘要:
There is provided a duct (10) and an associated preform (60) and method. The duct (10) is formed of a thermoplastic material and is lightweight, strong, flame and smoke resistant, and non-toxic. The duct (10) is formed from a flat laminate (58) and does not require a specialized, disposable mandrel for supporting conventional thermoset plies. Preferably, the duct (10) is formed from a preform (60), which is cut according to the desired shape and size of the duct so that trimming after the duct has been formed is not required. Additionally, features such as holes (74) and spud locations (70,72) can be provided by cutting or marking the preform before forming the duct. Each duct (10) can be formed of multiple articulated segments (20) that are joined by connectors (80).
摘要:
A turbine for use in electricity generation is provided with pipework for gas or vapour entering or leaving the turbine. The pipework includes a rigid section the centreline of which curves in three dimensions. The invention also extends to the pipework.
摘要:
A modular system for adapting a boom concrete system into a line concrete pumping system utilizes a first substantially 90 degree elbow connected to the pump outlet so that the concrete flow is directed downwardly from the outlet. A second substantially 90 degree elbow is pivotally attached to the first elbow so that the concrete flow direction can be selectively positioned in a horizontal plane. The second elbow further includes a reduced diameter at its outermost end.
摘要:
A novel method (500) for bending tubes (102; 410; 412; 414) suitable for use in high-purity fluid handling systems (400) includes selecting (502) a tube (102; 410; 412; 414) made from a material having a grain-size number of at least 5, and forming (504) a bend (104) in the tube with a bend radius (108) of greater than 1.5 times the diameter of the tube (102; 410; 412; 414). Tubes (102; 410; 412; 414) bent according to the present invention are incorporated into high-purity systems (400) as supply lines, product lines, and vacuum forelines, without the need for post-bend heat treatment or polishing (Fig. 5).
摘要:
A plumbing trap system (110) is provided with a pair of sanitary traps arranged in series between a first draining device (114) and the waste line. The first draining device (114) drains into the first, upstream sanitary trap (118) and then into the second, downstream sanitary trap (132). Noise which is caused by the draining of the second draining device (132) and which emanates from the first draining device (114) is hereby reduced.
摘要:
Bend for debouching structures of closed gas or oil appliances having an inner tube (1) for discharge of combustion air and an outer tube placed around the inner tube, the outer tube (12a,12b) being placed concentrically around the inner tube in order to define therewith an annular line for supply of combustion air to the gas or oil appliance, in which the inner tube and the outer tube have a fluently curved course in a main plane and in which only transverse to the main plane air guidance partitions (7) are present in the annular space, which guidance partitions substantially follow the curve of the bend.