Steam pipe connection and installation construction scheme

Pipe test and pipe purge
(1) pipeline test equipment installation, machine installation, and mechanical and electrical installation
A, hydrostatic test (steam pipe test) water pressure test medium: clean water do medium;
B) system water injection: should open the pipe each height of the exhaust valve, air exhaust. When the water is full, close the exhaust valve and the inlet valve, with manual pressure test pump or electric pressure test pump.
C) test procedure:
The boost speed is no more than 250KPa/min;
50% time pressure test when the pressure is up to the test.;
If there is no abnormal phenomenon, the pressure of each meter is 25% slowly to the test pressure, and the stop pressure is 10min;
(D) buck to the design pressure stop pressure 30min check the tightness of the system, in order to not buck, no leakage, visual no deformation.
When the design of test pressure is required, the design requirements are performed..
(2) pipe purge
Steam pipe installed by air blowing and selected mobile air compressor flow rate of not less than 20M/S and oxygen pipeline by production device air compressor purge, purge process. When visual without exhaust smoke should be in the exhaust port setting paste white cloth or oiled white paint wooden target plate, 5 minutes on the target plate rust, dust, moisture and other sundries in the qualified.
Two, steam pipe installation
1) pipe laying, pipeline slope should be not less than 3 per thousand, placing the drainage device should be strictly carried out according to the requirements of the drawings;
2) the thermal compensation of the pipeline adopts the combination of natural compensation and the corrugated compensator; the distance between the corrugated compensator can be determined by drawing or by the amount of expansion of the pipeline..
3) the horizontal section of the pipes, valves, etc. the front hole plate easy to water, are installed type drain valve steam trap;
4) horizontal pipe with eccentric adjustable tube, and lower back, to drain;
5) the branch must be drawn from the upper supervisor or both sides, not from the bottom out;
6) the upper part of the main line of the main line must be installed bypass pipe, and the installation of the drain valve and bypass valve are easy to remove River maintenance.;
7) the first bracket of the compensator shall not be fixed, and the bracket shall not be arranged between the starting point 0.5-1.0M of the compensation elbow.;
Consistent with the center of 8) to pipeline insulation layer is not damaged, bracket is arranged on the lower part of the pipe set height is greater than the thermal insulation layer thickness of bracket; the river of the guide grooves of the guide bracket sliding bracket to 3 ~ 5mm gap and center of the guide, the sliding bracket and a slide support, to avoid damage to the bellows expansion joints.
Three, to ensure the engineering quality of technical organization measures
(1) control of raw materials: the project required the main construction materials were by the construction unit responsible for, the purchase of materials and equipments must be to have production license, quality guarantee, ex factory quality certificate and test report. The supply mode of the processing order, semi-finished product and supply way shall be responsible for processing the order according to the progress of the construction units, and the design requirements shall be responsible for the processing orders, and the supervision of the supervision and construction units shall be accepted..
(2) construction of the whole process of quality control: in the process of construction conscientiously do a good job of raw materials control, process control, operation control, strengthen quality management of each process and engineering quality of the process of handing over inspection and professional jobs between transfer links take effective measures, strengthen inspection and acceptance, do a good job in the whole process of quality management.
(3) strengthen the inspection and acceptance system: the main materials, semi-finished products, finished products, construction accessories, equipment and equipment for on-site inspection. Where design functional safety of the product, should according to the various professional engineering quality acceptance specification inspected, and the supervision engineer, the construction units and technical person in charge of the inspection and acceptance.
Four, quality assurance measures
(1) strengthen the management of technology, earnestly implement the technical management system. Before the start of the implementation of post responsibility of all levels of personnel, carry out technical clarification; construction to carefully check the implementation of situation, carry out total quality management activities. The record of the project is well concealed, and the project quality inspection and assessment after the construction is finished, and the management of technical archives is finished..
(2) earnestly carry out the raw material inspection, steel, and other materials must provide quality assurance, and according to the provisions of sampling.
(3) technical review is prevent errors in the construction, to ensure project quality and to prevent the quality problems occurred in a effective technology management system, so in the construction process must strengthen technical review work.
(4) the quality control measures of common quality
Quality defects, mainly is the quality common fault has no foresight, failed to take effective measures to prevent and control, there is no strict according to the process of construction requirements and key link is not serious, resulting in quality defects. According to the common common quality defects in the construction, the cause of the occurrence of the analysis, formulate corresponding preventive measures, prevention and elimination of common quality.
(5) strengthen pre construction quality control, construction quality to a standard, we must give priority to prevention. Therefore I will quality management focus on the engineering quality pre control, by sub project excellent ensure branch works excellent, through the division of engineering better, ensure excellent engineering units.
Five, to ensure the security of technical organization measures
(1) all participating in the construction personnel must be strict compliance with the construction safety technical regulations of the safety management system, and accept the supervision and inspection, safety education before admission, access to the site must wear safety helmet and operations according to the provisions of the wearing of protective activities;
(2) hoisting construction workers must be closely coordinated, careful operation and obey the command, above all with the use of scaffolding must be lashing solid and reliable, and inspection;
(3) all the equipment, tools, rigging and so must be strictly checked, prohibited the use of substandard products. Field implement tools