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Leading position in strong and lightweight scaffolding tubes! Super Light 700 (SL700)

Lightweight scaffolding tubes
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Super Light 700 (SL700) is 25% lighter than its predecessor with the same or even greater strength and can help improve workability and reduce costs.

Twice the strength of conventional materials STX

Agricultural greenhouses Various structures Roller shutters Road materials
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STX is about twice as strong as a conventional product of the same size. Thus, it can reduce cost by strengthening the structures and reducing the number of components.

Rust-resistant, beautiful and environment-friendly tubes Perfect Post Zinc(PPZ) Post Zinc(PZ)

General scaffolding tubes Foundation shoring Transport equipment Road materials
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Manufactured using our unique “Daiwa Z Process,” a continuous manufacturing process of tube manufacturing and hot dip galvanizing. When compared with other manufacturing methods, this method offers extremely high corrosion resistance and a beautiful appearance, which allows the tube to be used for a wider range of applications.

Specially designed for winding, 3 times more corrosion resistance than conventional products Super Color

Winding shaft
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Super Color is coated with polyester inside and outside, which helps it withstand the harsh environment of high temperature and humidity.

Rigid steel conduits

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All the coils which we use to manufacture steel tubes are made by Nippon Steel Corporation. We achieve the high quality required for conduits by using the most advanced steel material and the reliable technology we have cultivated over many years.

JIS Standard products

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We manufacture products of outer diameter/thickness dimensions in accordance with Japanese Industrial Standards (JIS).

Product details

Light, strong, environment-friendly scaffolding tubes Super Light 700 (SL700)

Lightweight scaffolding tubes

Light, Strong and more efficient

Super Light 700 (SL700) is a lightweight scaffolding tube that perfectly balances the conflicting elements of “light” and “strong” steel tubes. The wall thickness of the steel tube is only 1.8mm. We have succeeded in reducing the weight by 25% and increasing the tensile strength by 40% compared with conventional products. The lightness of the product helps in reducing the workload at the site where the steel tubes are used and decreases the cost of transportation.

8本で約8kgも軽くなります

Leading position in lightweight scaffold tubes

Super Light 700 (SL700) is being sold since 1996. We take pride in the fact that we have sold 300,000 tons or 60 million units.

Cleared the safety standards of the Ministry of Health, Labour and Welfare

Super Light 700 (SL700) is not just a product with thinned-out material. It has been subjected to a 6-row 3-column full-scale load test for single tube scaffolding (conducted at the test site for the Industrial Association of Japan), and has been approved by the Ministry of Health, Labor and Welfare as being safe through various strength tests, prompting a revision of the Ministry of Health, Labor and Welfare’s ordinance on scaffolding tubes on March 5, 1996 (revision of Article 572 of the Ordinance on Industrial Safety and Health).

Flexible and strong steel tubes, twice as strong as conventional products STX

Agricultural greenhouses Various structures Roller shutters Road materials
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Resistant to natural disasters and flexible in design

STX is a high tensile strength steel tube with twice the strength of conventional materials. Ideal for greenhouses, resistant to natural disasters such as typhoons and snowfalls.

The greenhouse lasts longer due to rust-resistance.

With our unique all-round hot-dip galvanizing, sprayed parts are not prone to rusting. In addition, the unique high corrosion resistant top coat prevents rusting.

“Light,” “Strong,” “Economical”

[Light]

Due to significant strength, the weight can be reduced by reducing the tube size and thickness of the component.

[Strong]

Its high strength allows for increased component strength.

[Economical]

Reduces transport cost due to reduced tube weight and size. The reduction in the surface area of tubes also brings down the painting cost.

Rust-resistant, beautiful and environment-friendly tubes Perfect Post Zinc(PPZ) Post Zinc(PZ)

General scaffold tubes Flap angle (flap round) Transport equipment Road materials
Perfect Post Zinc Perfect Post Zinc

Comparison of corrosion resistance of PPZ and PZ

  PPZ/PZ pre-plating
Sectional view
External corrosion resistance (salt spray test 500 hours)
Outer surface
Inner surface

Zinc galvanizing and Daiwa Z Process

Perfect Post Zinc (PPZ) and Post Zinc (PZ) steel tubes are hot dip galvanized steel tubes manufactured by our unique line ~equipment using our “Daiwa~ which continuously performs tube manufacturing and hot dip galvanizing. “Daiwa Z Process” can drastically reduce the thickness of the alloy layer, which impairs corrosion resistance, by shortening the time previously required for immersion in the galvanizing bath from several minutes to several seconds.

Silver-white glow

Pure zinc with 99.995% purity is used for galvanizing, and a top coat (special rustproof transparent resin) is applied after galvanizing. This will ensure that the silver-white glow of Post Zinc is preserved indefinitely.

Excellent workability

The alloy layer of the galvanizing is much thinner than that of the batch hot-dip galvanizing, preventing the plating from cracking or peeling due to bending. High adhesion is achieved by a special high temperature baking paint developed by Daiwa Steel Tube Industries. The paint does not peel off even under severe bending, resulting in excellent workability.

Specially designed for winding, 3 times more corrosion resistance than conventional products Super Color

Winding shaft
Super Color

Polyester coating inside and outside

It has excellent corrosion and weather resistance and can withstand the harsh environment of high temperature and humidity.

Using Z18 equivalent welded galvanized steelsheet

Thickly galvanized on both inside and outside surface, these steel tubes are highly resistant to corrosion and effective in preventing rust.

Rigid Steel Conduits

Rigid steel conduits

All of the coils we use to manufacture steel tubes are made by Nippon Steel Corporation. We achieve the high quality required for conduits by using the most advanced steel material and the reliable technology we have cultivated through tube manufacturing and hot-dip galvanizing over many years.

Thick steel conduits

Thick steel tubes are threaded at both ends, conforming to the JIS C8305-2019 Standard. Hot-dip galvanizing is applied on inside and outside surfaces to prevent corrosion.. (Zinc adhesion: 300 g/m2 or more)

Thin steel conduit

Thin tubes are threaded at both ends, conforming to the JIS C8305-2019 < Steel Conduit > Standard. Hot-dip galvanizing is applied to external surfaces, and rust-proof paint is applied to internal surfaces. The outer surface is hot-dip galvanized over the entire circumference, including the electric welded parts of the tube, similar to thick steel conduits.

Threadless conduit

Threadless conduit, conforming to the JIS C8305-2019 < Steel Conduit > Standard. Hot-dip galvanizing is applied to external surfaces and rust-proof paint is applied to internal surfaces, similar to thin steel conduits. Thin and lightweight tube with excellent workability.

Product specifications

Anti-corrosion treatment

Product name Tube outer surface Tube inner surface
Perfect Post Zinc (PPZ) Hot dip galvanizing + top coat (chrome-free) Galvanizing
Post Zinc (PZ) Hot dip galvanizing + top coat (chrome-free) Anti-corrosion coating
Black tube

Standards

Carbon steel tube for general structure (JIS G 3444)

Type symbol Tension test Bending test Flattening test Main applications
Tensile strength N/mm2 Yield point or yield strength N/mm2 Growth % Bending angle Inner radius
(D is the outer diameter of the tube)
Distance between flat plates (H)
(D is the outer diameter of the tube)
No. 11 test piece
No. 12 test piece
STK290 290 or more 30 or more 90° 6D 2/3D Agricultural and structural use
STK400 400 or more 235 or more 23 or more 90° 6D 2/3D Agricultural and structural use
STK500 500 or more 355 or more 15 or more 90° 6D 7/8D Scaffolding tube, temporary component
STK290 Tension test ・Tensile strength N/mm2: 290 or higher
・Yield point or yield strength N/mm2: -
・Growth %/ No. 11 test piece
No. 12 test piece: 30 or more
Bending test ・Bending angle: 90°
・Inner radius (D is the outer diameter of the tube): 6D
Flattening test ・Distance between flat plates (H) (D is the outer diameter of the tube): 2/3D
Main applications Agricultural and structural use
STK400 Tension test ・Tensile strength N/mm2: 400 or higher
・Yield point or yield strength N/mm2: 235 or more
・Growth %/ No. 11 test piece
No. 12 test piece: 23 or more
Bending test ・Bending angle: 90°
・Inner radius (D is the outer diameter of the tube): 6D
Flattening test ・Distance between flat plates (H) (D is the outer diameter of the tube): 2/3D
Main applications Agricultural and structural use
STK500 Tension test ・Tensile strength N/mm2: 500 or higher
・Yield point or yield strength N/mm2: 355 or more
・Growth %/ No. 11 test piece, No. 12 test piece: 15 or more
Bending test ・Bending angle: 90°
・Inner radius (D is the outer diameter of the tube): 6D
Flattening test ・Distance between flat plates (H) (D is the outer diameter of the tube): 7/8D
Main applications Scaffolding tube, temporary component

Carbon steel tube for mechanical structure (JIS G 3445)

Type / symbol Tension test Bending test Flattening test Main applications
Tensile strength N/mm2 Yield point or yield strength N/mm2 Growth % Bending angle Inner radius
(D is the outer diameter of the tube)
Distance between flat plates (H)
(D is the outer diameter of the tube)
No. 11 test piece
No. 12 test piece
Class 11 A / STKM11A 290 or more 35 or more 180° 4D 1/2D Conveyors, tents
Class 12 A / STKM12A 340 or more 175 or more 35 or more 90° 6D 2/3D
Class 12 B / STKM12B 390 or more 275 or more 25 or more 90° 6D 2/3D
Class 11 A / STKM11A Tension test ・Tensile strength N/mm2: 290 or higher
・Yield point or yield strength N/mm2: -
・Growth %/ No. 11 test piece, No. 12 test piece: 35 or more
Bending test ・Bending angle: 180°
・Inner radius (D is the outer diameter of the tube): 4D
Flattening test ・Distance between flat plates (H) (D is the outer diameter of the tube): 1/2D
Main applications Conveyors, tents
Class 12 A / STKM12A Tension test ・Tensile strength N/mm2: 340 or higher
・Yield point or yield strength N/mm2: 175 or more
・Growth %/ No. 11 test piece, No. 12 test piece: 35 or more
Bending test ・Bending angle: 90°
・Inner radius (D is the outer diameter of the tube): 6D
Flattening test ・Distance between flat plates (H) (D is the outer diameter of the tube): 2/3D
Main applications Conveyors, tents
Class 12 B / STKM12B Tension test ・Tensile strength N/mm2: 390 or higher
・Yield point or yield strength N/mm2: 275 or more
・Growth %/ No. 11 test piece, No. 12 test piece: 25 or more
Bending test ・Bending angle: 90°
・Inner radius (D is the outer diameter of the tube): 6D
Flattening test ・Distance between flat plates (H) (D is the outer diameter of the tube): 2/3D
Main applications Conveyors, tents

Square steel tube for general structure (JIS G 3466)

Type symbol Tensile strength N/mm2 Yield point or yield strength N/mm2 Growth % Main applications
No. 5 test piece
STKR400 400 or more 245 or more 23 or more Flap angle
Foundation shoring
STKR490 490 or more 325 or more 23 or more
STKR400 ・Tensile strength N/mm2: 400 or higher
・Yield point or yield strength N/mm2: 245 or more
・Growth %/ No. 5 test piece: 23 or more
Main applications Flap angle, for agriculture
STKR490 ・Tensile strength N/mm2: 490 or higher
・Yield point or yield strength N/mm2: 325 or more
・Growth %/ No. 5 test piece: 23 or more
Main applications Flap angle
Foundation shoring

Steel conduit (JIS C 8305) (JIS C 8380)

Type Specifications Main applications
Thick steel conduits Inner and outer surface galvanizing, both ends threaded Conduit
Thin steel line Outer surface galvanizing, both ends threaded
Threadless conduit Outer surface galvanizing, threadless
Polyethylene-lined conduit Inner and outer surface polyethylene resin coating, both ends threaded
Thick steel conduits Specifications:
Inner and outer surface galvanizing, both ends threaded
Main applications Conduit
Thin steel line Specifications:
Outer surface galvanizing, both ends threaded
Main applications Conduit
Threadless conduit Specifications:
Outer surface galvanizing, threadless
Main applications Conduit
Polyethylene-lined conduit Specifications:
Inner and outer surface polyethylene resin coating, both ends threaded
Main applications Conduit

High-tensile steel tube

Applications Product name Tensile strength N/mm2 Yield point or yield strength N/mm2 Growth % Yield ratio % Steel tube thickness mm Remarks
Lightweight scaffolding tubes Super Light 700 (SL700) 700 or more 570 or more 10 or more 1.8 Conforms to the Ordinance on Industrial Safety and Health
For building structures 700N class structural high-tensile carbon steel tube 700 or more 520-760 10 or more 90 or less 2.0 or more Minister of Land, Infrastructure, Transport and Tourism Certification approved (No.MSTL-0197)
For general structures (agricultural, tents) STX 700 or more 570 or more 10 or more 2.0 or more
780 or more 1.2 / 1.6
Lightweight scaffolding tubes
Super Light 700 (SL700)
・Tensile strength N/mm2: 700 or higher
・Yield point or yield strength N/mm2: 570 or more
・Growth %: 10 or more
・Yield ratio %: -
・Steel tube thickness mm: 1.8
Remarks Conforms to the Ordinance on Industrial Safety and Health
For building structures
700N class structural / high-tensile carbon steel tube
・Tensile strength N/mm2: 700 or higher
・Yield point or yield strength N/mm2: 520-760
・Growth %: 10 or more
・Yield ratio %: 90 or less
・Steel tube thickness mm: 2.0 or more
Remarks Minister of Land, Infrastructure, Transport and Tourism Certification approved
No. MSTL-0197
For general structures (agricultural, tents)
STX
・Tensile strength N/mm2: 700 or higher
・Yield point or yield strength N/mm2: 570 or more
・Growth %: 10 or more
・Yield ratio %: -
・Steel tube thickness mm: 2.0 or more

・Tensile strength N/mm2: 780 or higher
・Yield point or yield strength N/mm2: -
・Growth %: -
・Yield ratio %: -
・Steel tube thickness mm: 1.2 / 1.6

Certifications

Perfect Post Zinc

Perfect Post Zinc (PPZ)

Public Works Research Center

Construction Technology Examination Certification proves corrosion resistance equivalent to hot dip galvanizing
700N class structural

700N class structural / high-tensile carbon steel tube (STX700) (STXR700)

Minister of Land, Infrastructure, Transport and Tourism

Obtained certification as a designated building material

Processing options

Swage

Swage

Pitch mark

Pitch mark

Cutting

Cutting

Surface painting

Surface painting

Pinning

Pinning

Drilling

Drilling

Stencil

Stencil

Tube end painting

Tube end painting