First, malleable iron pipe fittings before installation preparation
1, the installation equipment: roller slot machines, tapping machine, cutting machine, bracket.
2, material preparation: the pipeline to be safe, torque wrench, vernier caliper, a level, neutral lubricant (such as detergent).
3, check the mechanical equipment to ensure integrity. Roller slot machines should be placed in a spacious flat place to avoid machine vibration and impact upon the quality of the pressure tank rolling groove, according to regulate the size of the tube holder, ensure that the machine and the pipe remains level.
Second, malleable iron pipe fittings roll grooving
1, with a pipe cutter pipe will be cut to the desired length. Center vertical pipe should be cut, cut smooth, glitch-free.
2, will need to roll grooving pipe placed in the roller slot machines wheel and tail pipe supporting bracket, steel bracket slightly outward in the central position is appropriate. Horizontal measurement, adjust the level of the steel pipe, and to ensure that the pipe axis parallel to the axis of roller slot machines. Steel roller slot machines close to the end face of the stop surface.
3, press the handle, pressure roller slot machines on the pressure roller, press and hold the light pipe (hold the handle) to start the roll groove machine motor, then slowly pressurized pump will use the appropriate size (see specification sheet pressure roller) roll under the pressure of the outer wall of the pipe, even rolled steel pipe until it reaches a predetermined groove depth (see table slot size) so far.
4, measuring groove width, depth and roundness of compliance with standards.
5, turn the pressure relief screw, hydraulic pump pressure relief, the upper roll rises to leave the pipe trench, remove the pipe, check the pipe end sealing surface for damage, if not damage the rolling groove qualified.
Third, the clamp mounting
1. Before installing the pipe ends to check response. Deburring and may affect the enclosed area, to ensure the sealing performance.
2, the seal lip, side and back evenly coated with a lubricant to make it easy to install and free of scratches.
3, the first ring flip, put a steel pipe sealing position, and the other steel pipe alignment, put the ring upside down, so that the sealing ring is located in the middle of two pipe interface, the gap should meet the two pipe ends standard requirement.
4, check the pipe axis, so that the center line of two coincide. On the outer ring interface is installed, the next clip, and clamp the edge of the card into the pipe trench. Using both hands, pressing the upper and lower clamp ear with a hammer (rubber hammer) tapping clamp flange abutting the upper and lower clamp. Inserted into the bolt holes in the clamp at the uniform rotation with a torque wrench to tighten the bolts, seals prevent wrinkling.
5, check whether the full-circumferential flange clamp snaps into the groove.
Fourth, the mechanical three, four installation
1, the installation of mechanical tees, crosses, should be openings in the pipe branch pipe connector locations. Opening dedicated machinery and steel pipes with a center hole of the hollow drill bit.
2, the base of the V-shaped openings cavalry unit attached to the pipe, adjust the length of the chain, with the pin alignment, then the other end of the chain fastening nut, so that the machine is securely positioned on the pipe. For the opening corresponding to the size (see table hole size) has a positioning function dedicated core drill for drilling. Pulled drilling (reduction) handle so slowly down the hole saw, near the viewing tube opening position is correct, and appropriate to add lubricating coolant.
3, with a vernier caliper inspection hole size, and deburring, oil to the surface clean and smooth.
4, the seal lip and back Lubricate into mechanical tee (four) of the seal groove. Check the sealing ring gap must be uniform with holes, mounted on the pipe holes up and down, even with a torque wrench to tighten the bolts on both sides.
Fifth, malleable iron pipe fittings pressure test after installation
The entire pipeline is installed, the system pressure test should be carried out. Before the pressure test should fully test all parts are installed securely and reliably. Confirm after passing the pressure test. When the pipeline is full of media, under pressure, not turn clamps, nuts and other accessories. Pressure test pressure, duration, eligibility etc accordance with the relevant standards implemented.
