Black Hollow Section Cold Formed Welded Structural Hollow Section

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Product Description

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Basic Information
Model NO.
tyt
Material
Carbon Steel
Surface Treatment
Oiled
Usage
Pipeline Transport
Section Shape
Rectangular
Standard
GB/T3091-2001, BS1387-1985, ASTM A53-1996
Wt
20*40-350*400mm
Transport Package
Export Package
Specification
Od: 17-219mm, Wt: 0.8-10.0mm
HS Code
73063090
Production Capacity
300, 000tons/Year
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Product Description
Product NameRectangular Black Iron Pipe Specifications Per Weight
OD20-219mm, WT: 0.8-12mm
Size10*10-400*400mm, WT: 0.8-12mm
Length0.3-13m or as your requirement
SurfacePre-galvanized / Hot Dip Galvanized / Oiled / Painted
MaterialQ195 / Q215 / Q235 / Q345 / Q195-Q235
Standard (Round)ASTM-A53 / BS 1387-1985 / GB/T 3091-2001
Standard (Square)ASTM A500 / GB/T3094
EndsPlain / Beveled / Threaded with sockets coupling and plastic caps / Necking down / expanding neck / punching holes
Black Hollow Section Cold Formed Welded Structural Hollow Section
Black Hollow Section Cold Formed Welded Structural Hollow Section
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Product Specification Detail
Outer Diameter20*10-400*600mm
Wall thickness0.8-12mm
Length1-12m (Stock is 6m)
Material GradeQ195, Q215, Q235, Q345, Q195-Q235
Zinc CoatingPre: 60-150g/m2; Hot Dip Galvanzied: >200g/m2
TechniqueWelded / ERW / Cold drawn
Annual Output200,000 tons
Terms of TradeFOB, CFR, CIF
MOQ10 tons (Negotiable)
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Packing & Services
Packing: In bundles with steel strips.
Shipment: Length ≤5.8m by 20'GP, 6m-12m by 40'GP.
Special design available according to requirements.
All production processes under ISO 9001-2008.
Free samples provided.
Acceptable for third-party inspection (SGS, BV, etc.).
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Quality Inspection
Factory-owned experimental testing center with CNAS Laboratory Accreditation.
Strict dual-pass quality inspection: on production line and full final inspection.
International certificates: ISO, CE, LR, Philippine certificate.
Frequently Asked Questions
What materials are available for the rectangular pipes?
We provide various carbon steel grades including Q195, Q215, Q235, Q345, and Q195-Q235.
What surface treatments do you offer?
Our products can be Pre-galvanized, Hot Dip Galvanized, Oiled, or Painted based on your specific requirements.
What is the standard production length?
The length ranges from 0.3m to 13m. Standard stock length is 6m, but we can customize it to your needs.
Do you provide samples for quality verification?
Yes, we offer free samples for quality inspection purposes.
Is third-party inspection supported?
Absolutely. We accept inspections from recognized third parties such as SGS, BV, and others.
What are your quality certifications?
Our factory holds ISO 9001-2000, CE, LR, and CNAS Laboratory Accreditation certificates.

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