주식회사 태연이엔지


	1.1 Application Range This section is for cold and warm water, cooling water, refrigerant, fire extinguisher pipe or cold and warm water with temperatures of 200℃ or less.

2.1 General Items

   (1) All Pipes, accessories, flange, coupling, various valves and other accessories for the air
     conditioning pipes should be suitable for the systems standard pressure.

   (2) Various valves and accessories should be chosen depending on the liquid temperature and
     operational features.

   (3) Standard pressure for different purpose pipe accessories

2.2 Pipe Material and Accessories for Each Purpose

Usage Type		Aperture	Pressure (kg/cm )	PIPE		Accessories
Usage Type		Aperture	Pressure (kg/cm )	Material	Standard No	Accessories
Cold & HotWater Pipe	50 or less	50 or less	10	Copper pipe (L-TYPE)	KSD-5301	Welding Type
		65 -200	10	Copper pipe (L-TYPE)	KSD-5301	Welding Type
		250 or more	20	Carbon white Steel Pipes as Pressure pipe (SCH 40)	KSD-3562	Welding Type
Cooling Water Pipe	Indoor, Outdoor	50 or less	20	Carbon white Steel Pipes as Pressure pipe (SCH 40)	KSD-3562	Screw Type
	Indoor, Outdoor	65 or more	20	Carbon white Steel Pipes as Pressure pipe (SCH 40)	KSD-3562	Welding Type
	Outdoor Burial	All Aperture	10	Polyethilene Coated Steel Pipe (for Water Works)	KSD-3589	Welding Type
Water feed, Hot water supply, Hot water return, Water purification pipe	Indoor, Outdoor	50 or less	10	Copper pipe (L-TYPE)	KSD-5301	Welding Type
	Indoor, Outdoor	65 -200	10	Copper pipe (L-TYPE)	KSD-5301	Welding Type
	Outdoor Burial	All Aperture	10	Polyethylene Coated Steel Pipe (for Water Work)	KSD-3589	Welding Type
Sanitary & Sewage Pipe	All pipe	All Aperture	Atmospheric Pressure	Cast Iron Pipe for Sewage (Type I)	KSD-4307	M.J
Air Vent Pipe	All pipe	50 or more	Atmospheric Pressure	Carbon Steel Pipe (White)	KSD-3507	Screw Type
Air Vent Pipe	All pipe	65 or more	Atmospheric Pressure	Carbon Steel Pipe (White)	KSD-3507	Welding Type
Gas Pipe	Indoor	50 or less	10	Carbon Steel Pipe (White)	KSD-3507	나사식
	Indoor	65 or more	10	Carbon Steel Pipe (White)	KSD-3507	Welding Type
	Outdoor burial	All Aperture	10	Polyethylene Coated Steel Pipe (for Gas)	KSD-3589	Welding Type
Fire Water Supply Pipe	Indoor Fire Hydrant Sprinkler Siamese connection	50 or less	10	Carbon Steel Pipe (White)	KSD-3507	Screw Type
	Indoor Fire Hydrant Sprinkler Siamese connection	65 or more	10	Carbon Steel Pipe (White)	KSD-3507	Welding Type
	Gas Pipe	50 or less	20	Carbon white Steel Pipes as Pressure pipe (SCH 80)	KSD-3562	Screw Type
	Gas Pipe	65 or more	20	Carbon white Steel Pipes as Pressure pipe (SCH 80)	KSD-3562	Welding Type

* Use internal type gate and check valves at the pump outlet.
* When the gate valve and strainer are successively used, use an internal type.

2.3 Valve Application Standard

Applied Pipe		Butterfly Valve (Manual Wall Gear)	Ball Valve	Glove Valve	Gate Valve Outside and Yoke	Gate Valve Outside and Yoke	Used Pressure (kg/cm )
Air Conditioning Purpose	Cold Water Warm Water Cooling Water	65A or more 65A or more 65A or more	50A or more 50A or more 50A or more	- -	Bypass Pipe (Liquid Volume Control) Bypass Pipe (Liquid Volume Control) Bypass Pipe (Liquid Volume Control)	- - -	10 10 10
Fire Extinguisher	Fire Works	-	-	-	-	All Pipes	10
Gas	Town Gas	-	All Pipes	-	-		10

* Valve Joint Method
- 65A or more : Flange Type
- 50A or less : SCREW TYPE

2.4 Pipe Accessories

(1) Butterfly Valve

    1) The body should be made of flangeless aluminum alloy, cast iron, ductile cast iron or cast
      steel. For disks, the material should be hard chrome coated ductile cast iron, stainless or AL-
      Bronze cast steel.
    2) Both the body and disk should have flexibility, water and heat resistance, and friction
      resistance features. In addition, they should allow for the easy prevention of water leaks. The
      10㎏/㎠ valve seat is EDPM (Foreign product), and the 16㎏/㎠ valve seat should be a steel
      ring and rubber molding. The 30㎏/㎠ valve body should be carbon steel, and the disk is SUS
      316. An R-TEFLON reinforcement ring is attached to the seat. The stem (manufactured with
      17-4PH. SS. material with thermo-plasticity, water-resistance, heat resistance and corrosion
      resistance features) should be attached to main body and valve. The applied test pressure is
      57㎏/㎠.
    3) The valve opening and closing methods should be lever or handle driven gear style (The
      label indicates a motor for the opening and closing of the unit should be attached). A gear
      style is employed for 200 or more, while a lever style is for less than 200.
    4) The butterfly valve (installed at a high level) should not interfere with such activities as gear
      chain attachment.

(2) Impact Absorption Type Check Valve

    The body is made up of cast steel or ductile cast steel. The disk should be cast iron, or a
    bronze product, that has ensured impact absorption functionality and little pipe resistance.

(3) Disk Check Valve (Waver Check Valve)

    1) The Waver check valve should have a design that uses spring tension to close the disk.
      And it should have a structure that can be installed between flanges, while having adequate
      point gaskets, regardless of horizontal pipes. The liquid used is for water heating system,
      vapor and condensed water.
    2) The body material is bronze or stainless steel. The disk, or inner parts, should be stainless
      steel. The maximum working pressure is 16㎏/㎠ when the maximum working temperature is
      250℃ or more. The water pressure test should be conducted at 24㎏/㎠.

3.1 Common Items

(1) Pipe Preparation

    1) Location Selection
      In order to determine pipe locations, features such as minimum parallel and cross spacing
      with other pipes, required gradient, sleeve location, possible repair and pipe exchange
      should be considered before all pipe installation.
    2) Pipe pit, mold and sleeve fixation
      As for pipes that are embedded within concrete floors or walls, or pipes that penetrate them,
      mold or sleeves with enough strength should be installed at designated location before
      placing concrete.
    3) Support steel fixture
      ① Insert or steel fixtures, installed on the ceiling or wall, should be attached at exact
        locations without delay as the construction is carried out.
      ② For wall-embedded pipes, prevent percussion or abnormal vibration from being transferred
        to cause damages to the wall or pipe.
    4) As for drainage pipes embedded in concrete without steel, anti-corrosion measures, such
      as coal tar or anti-corrosion tape, should be taken before installation.

(2) Pipe Cutting and Section Processing

    1) Pipe Cutting
      ① After measuring the pipe length exactly, cut the pipe perpendicular to its axis. Do not use
        cutters or tools that may cause pipe diameter reduction or damage to the coating material.
      ② Be careful about the angle while cutting the ends of the branch pipes, which are attached
        with certain designated degree, to such main pipes as drainage or ventilation pipes.
    2) Section processing
      Use rasp or reamer to causeall pipe sections to have a smooth plane that is perpendicular to
        the pipe axis.

(3) Pipe interior check, cleaning, and pipe end protection

    1) For all pipes, check the inside before attaching them. After checking for the existence of
      foreign material, cleanly remove any steel chips, dust and particles.
    2) When the pipe work is completed or suspended, seal all pipe ends using plugs to prevent
      foreign material from entering the pipe.
    3) As for the polyethylene powder lining the steel pipes, prevent direct sun rays from
      damaging them.

3.2 Pipe Bonding

(1) Pipe joining between same materials

    1) Steel Pipe
      ① Screw Joint
        The screw follows KS B 0222 (taper screw for pipes). Use as little sealing tape, liquid
        gasket or calking material as possible for the male screw joint. Do not use hardened paint or
        putty. As for lining steel pipe or protective coating pipe, apply an appropriate amount of anti-
        corrosion material that is made of the same material with that of the pipe to the pipe section
        or the screw joint section.
      ② Screw shape drainage pipe coupling joint
        The joint method follows the description above. Carefully fasten the joint to maintain a small
        gap between the pipe section and the inner end of the female screw.
      ③ Flange Joint
        Packing should be less than 3mm. After placing it between the flanges to meet the inner
        side of the pipe, fasten the bolt evenly. Thin spreading of a small amount of filling material
        on both sides of the gasket is allowable. However, hardened paint or putty cannot be used.
        Flanges used for pipe lining, or protective coated steel pipe, should be coated or painted
        with the same material that is used for inner pipe.
    2) NO-HUB Cast Iron
      ① Coupling Joint
        After loosening the coupling band screw and separating the rubber ring from body, insert it
        into one end of the cast iron pipe. Insert the rubber ring into both sides of the cast iron pipe.
        When doing this, match both ends of the pipe with the central salient part of the rubber ring.
        After placing the body on the rubber ring, fasten both screw sides by using tools, such as
        hexagonal wrench, to make the rubber ring tight.
        Coupling is linked with the stainless body of the corrugated steel plate and 24 bands.
        Rubber ring should be made up of neoprene, which has strong anti-corrosive capacity.
    3) Lead Pipe
      ① Solder Joint
        Enlarge the one end of the pipe to have the same size with the pipes outer diameter, and
        then treat the section. For the other end of the pipe, cut it to have a cone shape that will fit
        the rake angle of the enlarged end. Then lightly tap the enlarged surface to join them without
        any gap. After cleaning the pipes outer surface (to be solder jointed), apply liquid to the
        whole surface. Then pour the melted solder into the joint. After finishing the pipe (to have
        even thickness around it), spread liquid while gradually cooling it. Then spray cold water to
        remove any dust from the surface.
      ② Divergent Joint
        Enlarge one end of the pipe to have the same diameter with the other pipe. Then treat the
        surface. After cutting the outer surface of the other end, apply enough amount of liquid and
        insert it. After that, pour some solder on the joint then rub it until the surface is shining.
    4) Bronze Pipe
      ① Weldin Joint
        Remove the overlay from the inner and outer surface of pipe end. Then clean the enlarged
        pipe, or the pipes outer surface, to be joined with the pipe coupling. Then apply flux and
        then assemble and weld it.
        The joint gap should have a large enough gap to allow capillary action. Choose adequate
        measure among soldering or brazing depending on the welding material.
      ② Flange Joint
        Flange joint for bronze pipe will be connected with pipe with brazing. After that, assemble
        the flanges and fasten it with bolts and nuts.

(2) Pipe joining between different materials

Pipe joining between different materials follows the table below.

Pipe Joining Type		Outline
Cast Iron Pipe	Steel Pipe	After corking each joint, use screw joint or flange joint
Cast Iron Pipe	Lead Pipe	After corking each joint, use solder joint or flange joint
	Bronze Pipe	Steel pipe is connected by screw joint using adapter. As for bronze pipe, employ a welding joint using insulation union or insulation flange.
	Lead Pipe	Use screw joint or plunder joint for each connection.
Lead Pipe	Bronze Pipe	Use a plunder joint.

3.3 Pipe Welding Joint

(1) Steel Pipe
    Welding method follows the descriptions below, in addition to the section 2.3 (Welding Material)
    and to 3.3(Welding), of 8-1, Chapter 8.

    1) Grooving
      ① Grooving, in principle, should be done by a machine. But if manual or automatic heat row
        cutting is unavoidable, make sure to use a grinder for the finishing surface touch. The
        grooved surface should be evenly treated, and then clearly remove any dust attached to the
        surface.
      ② The joints grooving sizes are as follows.

Grooving Shape	t [mm]	α [Degree]	a [mm]	b [mm]	Pipe Diameter of Carbon Steel Pipe for Piping(A)
	2.8～4.5		0～2		125 or less
	5.0	45	0～2	2.0	150
	5.8～7.9	70	0～2	2.0	200 or more

    2) Welding
      ① Butt Welding
        Attach three or four shape tack welding fixtures. Or weld downward while rotating the pipes
        using a clamp. If you can not rotate the pipe, weld it upward. If tack welding is done on the
        column, use a liner to remove the tack welding before commencing welding.
      ② Insert Welding
        Before piping, weld a screw-less socket on one direction of the pipe. Then insert the other
        pipe to a certain depth before welding.
      ③ Flange Welding
        After arranging a flange surface perpendicular to the pipe, and aligning their bolt holes, tack
        weld three or four spots. As for 65A or smaller pipes, weld one side. But for 80A or larger
        pipes, double side welding should be done.

3) Welding Inspection
    Carry out an appearance check on the welded part. If other inspections, other than welding
    inspection are required, follow KS B 0845 (Radiographic Examination of Welded Steel Joints
    and Image Classification Method) and KS B 0816 ( Penetrant Inspection Method and
    Classification of the Penetrant Indication).

3.4 Support and Fixation

(1) Assess any stress against lateral displacement and lateral acceleration. If necessary,
    examine buckling stress too. Install supporting steel fixtures, such as hangers, so not to cause
    deflection or vibration at the middle of each supported span. Support spacing is as follows.
    Use adequate insulation material (like rubber) to prevent the bronze or stainless steel pipe
    band or support steel fixtures from directly touching pipes.

Pipe	Summary				Spacing
Vertical Pipe	Main Steel Pipe	Straight PIPE			One per Spot
		Different Shape Pipe		Two Pieces	One per either of the side
				Three Pieces	One at the center
	Steel Pipe				One per each floor
	Soft Pipe, Hard Vinyl Chloride Pipe, Copper Pipe
Horizontal Pipe	Main Steel Pipe	Straight Pipe			One per Spot
		Specials Tube			One per Spot
	Steel Pipe		Pipe diameter of 20mm or less		Within 1.8m
			Pipe diameter of 25 to 40mm		Within 2.0m
			Pipe diameter of 50～80mm		Within 3.0m
			Pipe diameter of 100～150mm		Within 4.0m
			Pipe diameter of 200mm or more		Within 5.0m
	Lead Pipe		As for the places where there is a risk of pipe deformation, semicircle supports made up from zinc coated steel plate with the thickness of 0.4mm or more should be installed with the spacing of 1.5m or less
Pipe	Summary				Spacing
Horizontal Pipe	Bronze Pipe		Pipe diameter 20mm or less		>1.0m or shorter
			Pipe diameter of 25～40mm		1.5m or shorter
			Pipe diameter of 50mm		2.0m or shorter
			Pipe diameter of 65～100mm		2.5m or shorter
			Pipe diameter of 125mm or more		3.0m or shorter

(2) Install support fixtures, or concrete supports, under the lower part of the vertical pipe to
    prevent bended pipe deflection, or vertical pipes, due to the load of bended pipe.

3.5 Liquid Level Controller Installation

(1) Liquid level controller should be installed in a place where it can properly function, avoiding
    places such as the tank intake and outtake.

(2) If the controller is to be installed in a place where it cannot properly run due to motion or
    liquid, use protection pipes to prevent such influence.

(3) In order for the electrode type liquid controller to avoid error, place each electrode with
    adequate spacing or use a spacer.

(4) In order for the float type liquid controller to avoid error, maintain the proper space between
    each floats.

(5) Float type liquid controller should be installed away from pump intake.

(6) The connection point between liquid and electronic cable should be in places, like over the
    tank, free of inundation risks.

3.6 Pipe Displacement Absorber

(1) For pipes that pass through the expansion joints of the building, use pipe flexibility that can
    absorb the maximum relative displacement, or use displacement absorption joints.

(2) If the ground shape is unstable, or there is a risk of displacement between the building and
    the ground, take measures for intake pipes to absorb the displacement effect.

3.7 Wall, Floor or Roof Penetration

(1) Sleeve
    Bury the mold or sleeve in the pipe penetration areas that go through wall or floor. The sleeve
    should have the same strength with the pipes, or stronger than them. It should also have anti-
    corrosion capacity. When the mold or sleeve is embedded, reinforce it depending on its shape
    and size to prevent movement or deformation during concrete placement. For the parts that go
    through the waterproof layer, beam, earthquake resisting wall, exterior wall or floor -and needs
    to be washed with water, install proper sleeves.
    1) Waterproof layer penetration
      Use structures that tightly fit with the waterproof layer. In principle, use sleeves with water
      stopper.
    2) Floor penetration that require water cleaning
      Sleeve should be a steel pipe, and install it to go 30mm above the finish surface.
    3) Pillar, earthquake resistance wall, exterior wall penetration
      Use a shape and size that does not affect the structural strength.

(2) Pipe penetration gap
    For exposed parts that require noise prevention, or for fire zones following the construction or
    fire code, fill with non-combustible material according to the corresponding law. When pipe
    expansion is considered, follow the construction specifications.

(3) Exterior wall and roof penetration
    In order to prevent underground water or rain from permeating, use coal tar, asphalt,
    compound, lead or other water-tight material.

(4) Escutcheon plate
    If un-insulated pipe goes through ceiling, floor or wall, install escutcheon plate for its exposed
    part.

3.8 Test and Inspection

(1) After completing any part of the piping process, carry out a water pressure test and water
    filling test. Conduct the test before and after their burial for the pipes that are to be concealed
    or embedded, or for the pipes that are to have moisture prevention or protective coating.

(2) Test standard is as follows.

Test Method		Water Pressure						Air Pressure Test
Minimum maintenance period of minimum pressure (min)		1.72MPa 17.5kgf /cm	Twice the maximum working pressure	Twice the pump head described on the design drawing	1.5 times the maximum working pressure of Pressurized water delivery device	29.4kPa (3mAq)	Filling Water to the Brim	34.3 kPa 0.35kgf /cm
System		60	60	60	60	30	30	15
Vapor			○*1
Cold and Hot WaterCooling Water			○2 ○2
Oil*3
Refrigerant*4
Water supply … Water heating	Water lift pipe under direct High Water Tank	○	○*5	○*5
Water Drainage	Sanitary sewage pipe within the building, various drainage pipe, Site drainage pipeRain drainage pipe within the building. Drainage pump outtake pipe			○*5		○-- ○	○*6	○--○
Vent						○--		--○
Fire Extinguishment	Fire extinguishing pipe connection for the buildingWater supply pipe Connected water spraying facility	○8 ○8			○*7
비 고		1) The measured pressure is from the lowermost part. 2) If there are related water work code standards, they should also be followed. 1 Minimum 0.2MPa2kgf/cm2 2 Minimum 0.98MPa10kgf/cm2 3 Use products that have passed tests to comply with all laws, standards, and regional provisions regarding hazardous materials. 4 Conduct water leak test according to the refrigeration safety standard outlined in the High Pressure Gas Safety Control Law. 5 Minimum 0.74MPa7.5kgf/cm2 6 The water head test should be conducted from the bottom of the lowest pipe, to the highest pipe end within the testing area. 7 Connecting the system to a water delivery pipe is describe in number 9. *8 1.5 times the maximum working pressure of the fire pump or automobile pump

Note: Regardless of sides, follow ○ marked test description.