The neoprene latex cement mortar lining by adopting the method of spread of the construction

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1、The neoprene latex cement mortar lining by adopting the method of spread of the construction. Coating should be taken before shop with chloroprene latex cement slurry.Neoprene latex cement mortar shoulds not be too great a construction area, the layered construction, seam location should be staggere

2、d. Shop with the edge whenPaving wipe side pressure, should be a smooth, should not be repeatedly put pressure. When there are bubbles should prick compaction, surface should be compacted.3. The neoprene latex cement mortar construction requirements. Neoprene latex cement mortar construction 12 to 2

3、4 hours later, again on the surfaceCoating a layer of chloroprene latex cement slurry. For surface drying to not glue the hand, spray or covering plastic filmMaintenance.1 h413073 equipment and pipeline corrosion protection engineering construction requirementsEquipment and pipeline corrosion protec

4、tion engineering materials, surface treatment and structure layer construction quality, directly affects the equipment and pipeThe way of life and investment benefits. Anticorrosion construction quality from the source of raw materials, to each construction process, vigorously promotesEach link of t

5、he common faults may occur, strictly implement the relevant rules, norms and standards. This articles topic is:Prepare and pipeline corrosion protection engineering construction basic requirements; Surface treatment technology requirements; Equipment and pipeline anticorrosion construction technolog

6、yRequirements.A, the equipment and pipeline corrosion protection engineering construction basic requirements(a) general provisions1. The equipment and pipeline corrosion protection engineering construction should have commenced conditions, such as the outer wall attachment welding has been completed

7、.2. In the process of corrosion protection engineering construction, shall not be simultaneous welding, gas cutting, direct tapping operations. To notRemove the airtight device must be set manhole. The size of the manhole and quantity should be according to the size of the equipment volume, nominal

8、size itSet, and the number of manhole should not be less than 2.(2) of the substrate1. The surface of the steel equipment and pipeline can not have scars, porosity, slag inclusion, overlapping skin, severe corrosion spots, etc.; addSurface should be smooth, should not be empty, the phenomenon such a

9、s cavity, with the concave and convex surface shall not be more than 2 mm. Equipment and pipingSurface should be smooth level off, polished edges, burrs, and the casting residue, and smooth transition.2. The riveting equipment riveted joints should be flat seam, should use countersunk rivet, rivet i

10、nside the equipment should be no protruding rivet. inNeed for anti-corrosion lining construction of the pipeline and equipment, should set the leak detection hole when necessary, and should be set in the appropriate locationsPorosity.(3) the requirements of the weld and processing1. The butt weld su

11、rface should be smooth and shall be no stomata, flash and slag. The weld height should be less than or equal to 2 mm,And smooth transition. Angle and take over parts of the equipment welds shall be full, can not have burrs and sharp edges, should be fashioned into an obtuse Angle and shapeInto a cir

12、cular arc transition.2. The rounded part of the fillet weld, welding high Angle should be greater than or equal to 5 mm; Highlight the Angle of welding arc radius should be greater than orIs equal to 3 mm; An internal Angle of the welding arc radius should be greater than or equal to 10 mm. When the

13、 liquidation team of fixture, shall not damage the baseBody material.1 h413000 industrial electrical engineering installation technology, 157Second, the equipment and pipeline anti-corrosion surface treatment technology requirements(a) equipment and pipe surface treatment requirements1. The steel su

14、rface treatment effect meets the application requirements, anticorrosive effect on final influence is very big. Steel surfaces inJudgment of corrosion level and quality level of the requirements should be consistent with the coated steel surface treatment before coating surface cleanlinessDepending

15、on the evaluation of part 1: not coated steel surface and the total elimination of the original corrosion on the surface of the steel grade and after coatingProcessing level of the relevant provisions of GB/T8923.1-2011.2. The coating of steel surface treatment before, should first to determine corr

16、osion on the surface of the steel grade. Surface corrosion levelThe judgment of the divided into:Class A: steel fully covered with scale and almost no rust;Class B: steel corrosion has occurred and the partial oxidation skin peeling;Class C: steel surface scale due to corrosion and spalling or can s

17、have, and a small amount of pitting;D: steel surface scale because of corrosion pitting and comprehensive spalling and has been widely occur.(3) of the substrate surface processing requirements. Clean the water on the surface of the substrate and the oil, dirt, contamination, rust, andScale, so as t

18、o improve the quality of the coating and using effect. By oil pollution of the surface of the metal, before cleaning the oil should be clearIn addition, wash with water or steam. Old paint layer can use mechanical method, alkali solution QingChuFa QingChuFa, organic solvent.For example, oil storage

19、tank corrosion by chemical atmosphere, ocean, atmosphere, in the process of installation and use, surface residual saltPoints, oil, chemicals and other pollutants, if directly or polishing processing of sandblasting, as abrasive or part of the pollutantsCorrosion products of steel, and some will be

20、in the process, embedded on the surface of the anchor lines, forming oil film, etc.;Therefore, before the sandblasting or polishing processing should use high-pressure clean water flush the surface.4. The steel surface rust removal method. Hand tools can be used cleaning method, power tool cleaning,

21、 spray derusting method,Mass ejection rust removal method and chemical except induced method, etc.5. After injection or mass ejection derusting substrate surface requirements. Should be homogeneously rough surface, in addition to the substrate original corrosion or mechanicalDamage caused by the dep

22、ressions, should not produce visible to the naked eye pits and fly.(2) the quality levels of steel surface treatment requirementsThe quality levels of steel surface treatment requirements shall be determined according to the method in addition to pound and derusting degree, and meet the following re

23、quirements:1. Manual or power tool cleaning quality gradesManual or power tool cleaning metal surface treatment quality grades are divided into ST2, ST3 level two.(1) the ST2, hand and power tools in addition to lure thoroughly, no see the surface of the steel oil and dirt and no attachmentNot firm

24、scale, rust and paint coating and other attached objects.(2) & 3: very thorough manual and power tool cleaning. No one could see steel surface and no oil and dirtAttached not firm scale, rust and paint coating and other attached objects, rust removal should be more thoroughly than level ST2, substra

25、te show partThe surface should be with a metallic luster.2. Injection or mass ejection derusting quality gradesSpray or mass ejection derusting quality of metal surface treatment into SAL, SA2, SA2.5, SA3 level 4.(1) the SAL, mild injection or mass ejection derusting. Steel surfaces are seen grease

26、and dirt, and no attachmentFirm scale, rust and paint coating and other attached objects. .(2) SA2 level: thorough injection or mass ejection in addition to the pound. Steel surfaces are seen grease and dirt, and scale and ironRust and paint coating and other attached objects have been removed, its

27、residues should be firmly attached.(3) SA2.5 level: very thorough injection or mass ejection derusting. Steel no visible on the surface of grease, dirt, oxidation1581 h410000 mechanical and electrical engineeringLeather, rust and paint coating and other attached objects, any residual traces should b

28、e only slight discoloration of dot or stripes.(4) SA3, apparent clean metal injection or mass ejection derusting. Steel surfaces are seen grease, dirt, oxygenThe attachments such as leather, rust and paint coating, the surface should be showed homogeneous metal color.3, equipment and pipeline antico

29、rrosion construction technical requirementsEquipment and pipeline anticorrosion construction technology requirements including the acceptance of anticorrosion material and anticorrosion structure construction technical requirementsAnd thickness inspection quality requirements, should be strictly in

30、accordance with the construction of industrial equipment and pipeline corrosion protection engineering GB50726 -2011 and relevant industry standards.(a) the requirement of anti-corrosion materialRaw materials used in the anti-corrosion engineering, product quality certification, quality inspection r

31、eport and the product technical documents,And comply with the design requirements, when need to change the design, material substitution or adopting new materials, must consent of design department. DontStore more than time limit of coating should be used.For example: the coating is found during the

32、 construction of pigment appear precipitation phenomenon, reason has the following aspects: coating for long-term storage, storageHigh temperature; Use improper thinner or excessive dilution. Prevent measures: should strengthen library management; changeGood storage conditions; Control the paint mixing.