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Name: Roller Tube China Manufacturer
Material: Galvanized Steel / Q235 / Stainless Steel
Size: 1"- 4"
Length: 1.5m - 6m
Application: For Roller Shutter
Customized Service: Yes
Price: USD 10 - 50
Delivery: 7-15 Day
Material: Galvanized Steel / Q235 / Stainless Steel
Size: 1"- 4"
Length: 1.5m - 6m
Application: For Roller Shutter
Customized Service: Yes
Price: USD 10 - 50
Delivery: 7-15 Day
Quantity
As a core transmission component of rolling shutters, our Roller Tubes strictly comply with industrial-grade load standards. Available in galvanized steel, Q235 carbon steel, and stainless steel, with diameters ranging from 1 inch to 4 inches and lengths customizable from 1.5 meters to 6 meters, they are suitable for commercial, industrial, and fire-rated rolling shutter systems. As a trusted China Manufacturer, we employ high-frequency straight-seam welding and anti-corrosion surface treatment to deliver excellent torsional and bending strength, ensuring smooth and quiet door operation. Custom non-standard hole sizes, wall thicknesses, and surface coatings are supported, with fast delivery in 7–15 days, offering cost-effective OEM solutions for global customers.
Qishine, as a rolling shutter manufacturer and supplier, analyzes the differences between three mainstream tube materials based on practical engineering experience and case studies. There is no single"best"material—only the one most suitable for your working conditions. Whichever Roller Tube you choose, partnering with a reliable China Manufacturer ensures precise specifications and stable delivery.
1. Galvanized Steel Tube – Economical First Choice
- Advantages: The hot-dip galvanized layer (≥80g/㎡) provides good corrosion resistance at only 1/3 the cost of stainless steel. The base material is Q215 or DX51D, with a yield strength ≥235MPa, meeting everyday wind load requirements. For budget-sensitive indoor projects, this Roller Tube is a mature solution widely supplied by many China Manufacturers.
- Disadvantages: The cut ends are uncoated; if anti-rust paint is not applied during installation,"red rust"can spread inward from the ends within 3–5 years. Not suitable for coastal high-salt environments (C5 corrosion grade and above).
- Applications: Ordinary retail shops, underground garages, warehousing and logistics in dry inland environments—budget-conscious projects.
- Advantages: The hot-dip galvanized layer (≥80g/㎡) provides good corrosion resistance at only 1/3 the cost of stainless steel. The base material is Q215 or DX51D, with a yield strength ≥235MPa, meeting everyday wind load requirements. For budget-sensitive indoor projects, this Roller Tube is a mature solution widely supplied by many China Manufacturers.
- Disadvantages: The cut ends are uncoated; if anti-rust paint is not applied during installation,"red rust"can spread inward from the ends within 3–5 years. Not suitable for coastal high-salt environments (C5 corrosion grade and above).
- Applications: Ordinary retail shops, underground garages, warehousing and logistics in dry inland environments—budget-conscious projects.
2. Q235 Carbon Steel Black Tube – High-Strength Heavy-Duty Type
- Advantages: High material purity, yield strength ≥235MPa, small welding heat-affected zone, and better torsional rigidity than galvanized tubes of the same wall thickness. Ideal for extra-wide doors (>6m) or high-frequency operation (>50 cycles/day), with wall thickness optionally increased to 3.0mm or more. If you require such heavy-duty Roller Tubes, an experienced China Manufacturer can provide professional thickening and tempering processes.
- Disadvantages: No corrosion resistance whatsoever; rust appears within 1–2 months in open air. Must be used with powder coating or polyester baking paint, and any coating damage must be promptly repaired.
- Applications: Heavy industrial plants, large loading bays, sandstorm-resistant doors—used with epoxy zinc-rich primer for double protection.
- Advantages: High material purity, yield strength ≥235MPa, small welding heat-affected zone, and better torsional rigidity than galvanized tubes of the same wall thickness. Ideal for extra-wide doors (>6m) or high-frequency operation (>50 cycles/day), with wall thickness optionally increased to 3.0mm or more. If you require such heavy-duty Roller Tubes, an experienced China Manufacturer can provide professional thickening and tempering processes.
- Disadvantages: No corrosion resistance whatsoever; rust appears within 1–2 months in open air. Must be used with powder coating or polyester baking paint, and any coating damage must be promptly repaired.
- Applications: Heavy industrial plants, large loading bays, sandstorm-resistant doors—used with epoxy zinc-rich primer for double protection.
3. Stainless Steel Tube (304/316) – Weather Resistance Champion
- Advantages: 304 contains over 18% chromium, forming a self-repairing passive film that never rusts; 316 adds molybdenum, improving chloride corrosion resistance by 3 times. The bright silver finish requires no subsequent painting, with zero maintenance cost. For demanding export projects, overseas clients often specify this type of Roller Tube, with qualified China Manufacturers providing full-process quality control.
- Disadvantages: Price is 4–5 times that of galvanized tubes; austenitic stainless steel has a relatively high coefficient of thermal expansion (approx. 16×10⁻⁶/℃). When temperature differences exceed 60℃, thermal expansion clearance must be considered to avoid end jamming.
- Applications: Food workshops, pharmaceutical cleanrooms, seaside villas, chemical laboratories—hygienic or highly corrosive environments, as well as boutique storefronts where aesthetic appearance matters.
- Advantages: 304 contains over 18% chromium, forming a self-repairing passive film that never rusts; 316 adds molybdenum, improving chloride corrosion resistance by 3 times. The bright silver finish requires no subsequent painting, with zero maintenance cost. For demanding export projects, overseas clients often specify this type of Roller Tube, with qualified China Manufacturers providing full-process quality control.
- Disadvantages: Price is 4–5 times that of galvanized tubes; austenitic stainless steel has a relatively high coefficient of thermal expansion (approx. 16×10⁻⁶/℃). When temperature differences exceed 60℃, thermal expansion clearance must be considered to avoid end jamming.
- Applications: Food workshops, pharmaceutical cleanrooms, seaside villas, chemical laboratories—hygienic or highly corrosive environments, as well as boutique storefronts where aesthetic appearance matters.
Selection Summary:
- Cost priority + indoor → Galvanized tube
- Strength priority + with painting line → Q235 black tube
- Longevity priority + maintenance-free → Stainless steel
- Key Reminder: Whichever material you ultimately choose for your Roller Tube, be sure to confirm that the China Manufacturer thoroughly removes all burrs inside and outside the tube. Because during operation, burrs scratching the curtain slats are the No. 1 cause of door failure—this factor affects service life more directly than the material itself.
- Cost priority + indoor → Galvanized tube
- Strength priority + with painting line → Q235 black tube
- Longevity priority + maintenance-free → Stainless steel
- Key Reminder: Whichever material you ultimately choose for your Roller Tube, be sure to confirm that the China Manufacturer thoroughly removes all burrs inside and outside the tube. Because during operation, burrs scratching the curtain slats are the No. 1 cause of door failure—this factor affects service life more directly than the material itself.
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