렉스틸 - Corrugated Steel Pipe

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Type of pipe
Category		PE coated corrugated steel pipe	Resin corrugated steel pipe	High-strength PE triple-wall pipe (ductile pipe))	Centrifugal force RC Pppe (Hume pipe)	Resin concrete pipe	Fiberglass composite pipe	Double wall PVC pipe
Shape
Related Specification		KS D 3590	KS D 3590	ASTM D 2412	KSF 4403	KBM 3375	KSM 3370	KSM 3600
Material		Five layer-coating on both sides of galvanized steel plate with the laminating method to improve corrosion resistance and durability	The rigidity is increased with the jagged shape, and the surface of corrugated steel pipe is triple treated with epoxy and PE to improve the corrosion resistance and durability	Manufactured by coiling a square pipe made of high-density PE material into a screw shaped pipe with a grate-type reinforced structure in the air.	Manufactured by inserting iron wires such as vertical screws and oblique wires in the wall of a concrete pipe created by centrifugal force rotation	Uses polyester resin instead of cement, and aggregate and iron wire are integrally molded by centrifugal force.	High rigidity by forming a sand layer in the center with a special design, and reinforces the inside and outside with a glass fiber layer	By mixing impact-resisting agents and additives in PVC resin, the inner and outer surfaces are simultaneously extruded.
Manufacturing Specification		D150~2,400MM	D300~2,600MM	D150 ~ D1,000MM	D250 ~ D1,800MM	D250 ~ D1,200MM	D150 ~ D3,000MM	D100 ~ D600MM
Production Length		L = 6.0M~10M/per pipe	L = 6.0M/per pipe	L = 6.0M/per pipe	L = 2.5M/per pipe	L = 2.5M/per pipe	L = 12.0M/per pipe	L = 6.0M/per pipe
P h y s i c a l a n d c h e m i c a l p r o p e r t i e s	Water Pressure (kgf/㎡)	-	3	3	2	-	6	4
	Tensile Strength (kgf/㎡)	370	381	230	-	-	1,500	450
	Compressive Strength (kgf/㎡)	1,800	1,650	-	400	-	800	1750
	Elongation (%)	41	37	600 or more	-	-	1.4	100
	Coefficient of Thermal Expansion (㎜/m℃)	-	1.7 × 10^-5	11 × 10^-5	1 × 10^-5	-	1.34 × 10^-5	6.5 × 10^-5
	Impact Resistance	Strong against external impact	Strong against external impact	Strong against external impact	Strong against external impact	Excellent external pressure strength (21,600kg/m)	Strong against impact as a strong ductile pipe	Strong against impact as a ductile material
	Chemical Resistance	Strong against salt and excellent corrosion-resistance	PE coating for anti-corrosion	No reaction to the conditions of acid and alkali substances	Easily corroded by various organic substances such as acids, alkalis, and salts Possible to add chemical-resistant materials	Highly corrosion-resistant to acids, alkalis, salts and various organic substances	No reaction to the conditions of acid and alkali substances	Highly corrosion-resistant to acids, alkalis, salts and various organic substances
	Anti-corrosion	Excellent	Good	Excellent	Good	Excellent	Excellent	Excellent
	Flexibility	East piping in any terrain Good response to buried ground even in case of differential settlement	East piping in any terrain Weak joints in case of differential settlement	East piping in any terrain Good response to buried ground even in case of differential settlement	Weak joints in case of differential settlement	Weak joints in case of differential settlement	Better than concrete pipe as each deformation of joint is allowed	East piping in any terrain Good response to buried ground even in case of differential settlement
	Water Permeability (Roughness Coefficient)	n = 0.013, Normal rain flow	n = 0.010, Smooth rain flow	n = 0.010, Smooth rain flow	n = 0.013, Normal rain flow	n = 0.010, Smooth rain flow	n = 0.01, Smooth rain flow	n = 0.01, Smooth rain flow
C o n n e c t i n g m e t h o d	Straight Pipe	Coupling band joint Sleeve joint	Flange joint	Socket joint for tightening and watertighting Electrofusion joint, watertight sleeve joint	Straight pipe (Type A) : watertight belt (band), collar + mortar joint Socket (Type B) : rubber ring joint	Rubber ring and watertight band joint	Flange, coupling, band joint	Rubber ring socket joint
C o n n e c t i n g m e t h o d	Pipe with different shapes	T-pipe joint Connecting pipe production	Flange and socket joint	Connecting pipe production Branch connector after perforation	Hume pipe(T-type) production Branch connector after perforation	Connecting pipe production Electrofusion joint	Flange, coupling, band joint	Rubber ring socket joint
C o n s t r u c t a b i l i t y	Advantages	Easy to handle due to its light unit weight, and excellent constructablity with simple connection method Durable for differential settlement, soft ground, etc., no risk of separation or damage. Excellent corrosion resistance, durability and chemical resistance Excellent watertightness	Easy to handle and install due to its low weight, and excellent corrosion resistance, durability and chemical resistance. Excellent external pressure strength and low maintenance cost Excellent watertightness	Excellent durability and impact resistance Excellent chemical resistance, corrosion resistance and abrasion resistance Semi-permanent Strong for differential settlement	Excellent corrosion resistance and durability Strong buoyancy resistant due to its heavy weight Widely used in sewage piping, and low cost Good watertightness when joining watertight belts (bands)	Strong corrosion resistance to acid and alkali Light weight and easier to construct than hume pipes Excellent resistance to freezing and thawing due to low absorption rate	Light weight, easy to handle and construct Easy to join, reduced manpower and time Curved part is possible because bend piping is allowed which creates an angle to the connection part Durable for differential settlement, soft ground, etc., no risk of separation or damage	Light weight, easy to transport and install Good response to differential settlement Strong against acid and alkali and excellent water permeability Excellent watertightness with socket joint using rubber ring Joinable regardless of soil quality, season, moisture, water, etc., reducing cost and period
C o n s t r u c t a b i l i t y	D i s a d v a n t a g e s	Light weight and weak buoyancy resistant As a a ductile pipe, precise construction required for backfilling and compaction	Risk of separation of connectors due to differential settlement. Risk of corrosion of cut and perforated area High material cost Many cases of internal coating and epoxy falling off after pipe installation.	Light weight and weak buoyancy resistant Risk of groundwater inflow and leakage at joint areas As a ductile pipe, shape can be deformed by external pressure. New piping required for temperature difference	Unfavorable handling and construction due to heavy weight Increases cost due to the installation of foundation concrete in case of construction in soft ground Weak to acid, alkali and salt damage	Insufficient construction performance Not KS certified	Low domestic performance Light weight and weak buoyancy resistant As a brittle/flexible pipe, precise construction required for backfilling and compaction	Light in weight, easy to transport and install, but need to pay attention to buoyancy during construction Risk of some degree of deformation during backfilling and compaction
Durability		Over 70 years (good)	Over 50 years (good)	Over 50 years (good)	20 ~ 30 years (average)	Over 50 years (good)	Over 50 years (good)	Over 50 years (good)
Maintenance		light in weight, easy to handle, and easy maintenance due to simple joining method	Partial repair not preferred in case of pipe damage	light in weight, easy to handle, and easy maintenance due to simple joining method	Cost increase due to pipe foundation construction, but advantageous for small-diameter pipes	Unfavorable handling due to its heavy weight, but easy maintenance due to simple joining method	Partial repair not preferred in case of pipe damage	Easy to handle due to its light weight, and easy maintenance due to various joint methods
Economical (price-based)		Low cost and advantageous for small and medium diameter pipes	High cost (material cost)	High cost, but advantageous for small-diameter pipes	Cost increase due to pipe foundation construction, but advantageous for small-diameter pipes	High cost	High cost (material cost), but advantageous for medium and large pipes	Advantageous in places where need many connecting parts because of low cost for joining Preferred for small diameter pipes (D300MM or less)
Recommendation
Application		Commonly used for public projects	Preferred for expensive products or large pipes (D1500 or more)	Expensive	Commonly used	Expensive	Expensive	Old downtown areas, narrow alleys, small pipes