【 Weak current College 】 pipeline construction drawings to read and do the installation budget basics (2)

Second, drainage works

(A) sewage and category: life, production, rain snow

(B) of the drainage system: combined, shunt

(3) drainage systems: outdoor, indoor

3. heating engineering

(A) the classification of heating system

1. by using htm: hot water, steam, hot air

2. Press cycle power: machinery, natural

3. press for backwater method: single-, double-tube

4. press the heating range: local, Central and regional

(2) hot water heating system of basic forms

1. for the next two-pipe

2. for the last time two-pipe

3. vertical single-tube: sequential, leaping, adjustable sequential, backwards-

4. single-pipe system

5. the level of single-pipe system

6. district heating

7. reverse return, ISO range

(3) the main equipment of heating system

1. expansion water tank: (on-pump suction) constant pressure, exhaust, to accommodate the expanding role of water, signal

2. the gas tank

3. compensator: (senior) corrugated compensator, sleeve compensator, natural expansion force Compensator

4. ventilation and air conditioning

(A) air conditioning classification

1. press the air treatment equipment settings:

Focus system: air conditioning unit directly supply rooms

Half-focus system: cold water unit – air supply unit/fan coil

All distributed system: cold water unit: fan-coil

2. press the burden on the indoor load different types of media: all air systems, water systems, air-water system, refrigerant system

3. in accordance with the centralized air conditioning air source: closed, circulations, hybrid

4. in accordance with subparts: air-conditioning system, air-conditioning system, clean air conditioning systems, refrigeration systems, cold water unit, cooling tower

(2) main equipment; air conditioning unit, fresh air handling units, fan-coil

(3) ventilation system:

1. exhaust system: civil defense, basement, garage (steel plate, glass fiber reinforced plastic)

2. the smoke control system (steel plate, glass, fabric duct)

3. dust removal system

5. boiler classification and designation methods

(A) classification

1. by purpose: industrial, heating and power station, locomotive

2. press to provide heat medium: steam, hot water

3. in terms of structure: fire tubes, pipes, fire tube hybrid

4. press the fuel: coal, fuel oil, gas

5. press the combustion seperate: hand burn and machinery

6. press the monolithic way: fast installation, Assembly, bulk

(Ii) model representation

Parcelled combustion evaporation capacity (T/H)

K: L: fast loading grate WN: horizontal internal combustion oscillation grate Z: ZZ: longitudinal home-style W: reciprocating grate

XX/XXX-XX-superheated steam outlet pressure temperature combustion type design order

Chapter III specifications

(A) water and heating

1 .. valve installation should be strength test, from a batch of 10 per cent in pumping, to extract 10% rate of 95 percent or 99.9 per cent are not eligible. Strength test pressure = nominal pressure * 1.5; tightness test pressure = nominal pressure * 1.1

2. installation in the main tube of a cut of the closed valve should be individually for strength and tightness test.

3. pipe outside diameter of punch elbow should = bend diameter

Ordinary pressing elbows welded steel pipe

Seamless punch elbow pipe

Welded steel pipe DN100 nominal diameter

Pipe outside diameter Φ 100 * 4.5 * thickness

Spiral welded pipe D109 * 4.5 outer diameter * thickness

4. basement or ground floor there is a pipeline across the exterior wall of the structure should be taken when there is proof measures should be strict requirements of flexible waterproof casing.

Rigid waterproof casing: General design does not require using

Flexible waterproof casing: design parts; a high groundwater; water tank

5. pipeline crossing expansion joints, settlement joint, seismic gap installation should take the following measures:

(1) expansion joints: water, sprayed with rubber soft joints; frozen water with stainless steel flexible joint

(2) expansion force elbow (4 x 90 ° elbow for wire-line)

(3) leave a big hole (the pitch pipe jacketing 150mm clearance)

(4) adopt rubber bellows (commonly used for spraying)

6. support the correct position, should be laid flat and firm: (1) equipment and accessories should be set hanger, bracket, bracket

(2) Terminal, elbow, three links (3) distribute by standardizing spacing arrangement (Note: the spray tip should anti shake bracket)

7. retention bracket and conduit should secure seamless.

8. slide the bracket, and slide drag and chute should have 3-5m clearance.

9. no thermal expansion pipe hangers hangers should be installed vertically, thermal elongation piping hangers hangers should reverse bias direction of thermal expansion.

10. fixed on the structure of the buildingPipe hangers will not affect structural integrity.

11. heating, water, hot water system risers tube cards settings:

(1) floor height the 5m, each layer must Pack 1

(2) floor height > 5m, each layer should not be less than 2

(3) pipe clamp mounting height distance 1.5-1.8m, 2 pipe symmetry

(4) multiple layers of water supply, drainage pipe diameter greater than when the standpipe can 25mm without bracket, but vertical sewer pipe should be added at the bottom.

(5) drainage water of cast iron, galvanized steel risers should be made of the landing card bracket.

12. be flexible pipe, casing heating, hot water, refrigeration, cooling, condensation water through walls and floors should be cased, water, fire, sprinkles, drainage unnecessary.

13. water supply pipeline: galvanized steel pipe the DN100 thread connection, flange DN100 > or clamp connection; water supply pipe and plastic pipe can use rubber ring interface, bonding, hot melt, special fittings and flanges; water supply for cast iron pipe: cement adhesive or rubber rings; copper pipe: Special connectors or soldering

13. bolt tightening, highlight the length of the diameter of screw nut by 1/2, thread connection 2-3 should be exposed.

14. water standpipe and fitted with a greater than or equal to 3 points of water distribution pipe begins divided should install detachable connectors (such as live connector) but if you have a water meter, flange valves do not need to add.

15. on hot and cold water: cold, hot and cold right and left.

16. anti-corrosion treatment: cast iron pipes buried drainage: asphalt anticorrsion; buried pipe (including galvanized steel): three levels of protection.

17. water tank overflow pipe and drain piping should be located near but not in the drainage and drain pipes connected directly.

18. the damping of the vertical pump spring shock absorbers should not be adopted.

19. indoor drainage pipe: U-PVC drain pipe, cast iron pipes, concrete pipe, composition washbasin and drinking fountains to share water and drainage connection health apparatus available short Park.

With 1 stool of pipes on the DN100, with 1 stool Groove tube of DN150, received three or more pieces, health apparatus "DN75

20. indoor rain: water supply for cast iron pipes, water pipes, galvanized steel pipe, clarinet (internal coating)

21. the standpipe inspection openings every layer with a, the bottom and top with health apparatus must be added.

22. drainage pipe and trunk pipe (such as inside tube) to pass the ball to the ball diameter of test drainage pipe diameter of 2/3. U-PVC drainage pipe should be expansion joints or tee (with expansion joints) and collar (or fire casing). Expansion joint spacing is not greater than 4 metres.

23. connect two or more of the stool or 3 or more in health apparatus cross tube should be set to sweep exports. (Clearing equipment)

24. horizontal and horizontal pipelines, horizontal and vertical pipes should be 45 ° tee or 45 degree four-way, 90 degree lateral or 90 ° angled stone. Vertical pipes and drains should be 2 x 45 ° elbow or radius of curvature not less than 4 times the diameter of 90 ° elbow (TY-links).

25. drainage snorkel 300mm, higher roof must be greater than the thickness of snow cover (not on the roof) Beijing as 600mm.

26. to outdoor drainage pipe wall or foundation we must reverse it should adopt the 45 degree elbow or three links, and should be set in the vertical pipe segment scan exports.

27. indoor hot water is divided into: the whole cycling, half-cycle, no loops. Hot water pipes should make full use of the natural thermal expansion compensation (elbow, square expansion force)

28. water pipes should be flushing, tank does not make the hydraulic test only irrigation test. Hot water storage tanks for water, set, water tanks, water tank, etc should be insulated. Open water tank experiment should be full of water, confined water tank should be made to the hydraulic test.

29. health apparatus Setup should use embedded bolt or expansion bolt fixing. Health apparatus should be full of water and water testing.

Water supply pipe distance and height: washbasin, toilet 250mm 450mm, bathtubs, shower 670mm 1150mm, squatting Pan (manually since closed) 600mm, vertical urinal 1130mm, Hung urinal 1050mm

30. the indoor heating pipe: welded steel pipe the DN32 thread connection, > DN32 welding

31. pipe slope: soft drink with hot water pipe, steam pipe and condensate pipe slope par, must not be less than the equator. Soft drink reverse flow, water pipe, steam pipe slope greater than or equal to five per. Radiator pipes gradient equal to 1% slope to be conducive to drainage and discharge.

32. the balancing valves and control valves (System of trunk pipe) have direction, with pressure ranges.

33. Parties compensator should have a whole stewed root seamless steel pipe.

34. the radiator pipe length should install > 1.5m pipes.

35. for the next time the system of hot water for dry pipe reducer connections should be top-eccentric, steam pipe reducer should base flat eccentric connection.

Hot water, steam and hot water on the back under the steam

36. the expansion tank expansion pipe and circular tube must not be combined with the valve.

37.N32DN25 high temperature water (110-130. C) with flanges or flange valve.

Non-high-temperature water pipe in the ceiling, it is best not to use live connector, or flange valve threaded valve with a pair of flanges.

38. radiator bring enough film, 14 slices following 2 legs, 14 slices over three legs. 20 piece above la bars.

39. filter: pump entrance plus, smaller.

40-Remover, entire floor heating system, heat exchanger stations, boiler room, backwater housekeeper remover.

Limber General shall by-pass pipe. Major clearing, bad equipment should bypass attachment.