Factory directly Black Phosphating Seamless High Precision Steel Tube - Solar Mounting Galvanized Square Steel Pipe – Youfa

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As a result of ours specialty and service consciousness, our company has won a good reputation among customers all over the world for Spiral Welded Steel Pipe Piles, Black Steel Round Pipe 4mm Thickness, Cold Rolled Black Erw Steel Pipe, Since establishment within the early 1990s, now we have arrange our sale network in USA, Germany, Asia, and several Middle Eastern countries. We intention to get a top class supplier for worldwide OEM and aftermarket!
Factory directly Black Phosphating Seamless High Precision Steel Tube - Solar Mounting Galvanized Square Steel Pipe – Youfa Detail:

Product Galvanized Square and Rectangular Steel Pipe with Holes
Material Carbon Steel
Grade Q195 = S195 / A53 Grade A
Q235 = S235 / A53 Grade B / A500 Grade A / STK400 / SS400 / ST42.2
Q345 = S355JR / A500 Grade B Grade C
Standard DIN 2440, ISO 65, EN10219

GB/T 6728

JIS 3444 /3466

ASTM A53, A500, A36

Surface Zinc coating 200-500g/m2 (30-70um)
Ends Plain ends
Specification OD: 20*20-500*500mm ; 20*40-300*500mm
Thickness: 1.0-30.0mm
Length: 2-12m

Strict Quality Control:
1) During and after production, 4 QC staffs with more than 5 years experience inspect products in random.
2) National accredited laboratory with CNAS certificates
3) Acceptable inspection from third party appointed/paid by buyer, such as SGS, BV.
4) Approved by Malaysia, Indonesia, Singapore, Philippines, Australia, Peru and UK. We own UL /FM, ISO9001/18001, FPC certificates


learn more about certificates

quality control

Packing and Delivery:
Packing Details : in hexagonal seaworthy bundles packed by steel strips, With two nylon slings for each bundles.
Delivery Details : Depending on the QTY, normally one month.


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Factory directly Black Phosphating Seamless High Precision Steel Tube - Solar Mounting Galvanized Square Steel Pipe – Youfa detail pictures


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We always continually offer you by far the most conscientious customer service, and the widest variety of designs and styles with finest materials. These attempts include the availability of customized designs with speed and dispatch for Factory directly Black Phosphating Seamless High Precision Steel Tube - Solar Mounting Galvanized Square Steel Pipe – Youfa, The product will supply to all over the world, such as: Zimbabwe, Johor, Chile, Our factory is equipped with complete facility in 10000 square meters, which makes us be able to satisfy the producing and sales for most auto part products. Our advantage is full category, high quality and competitive price! Based on that, our products win a high admiration both at home and abroad.
  • The company has rich resources, advanced machinery, experienced workers and excellent services, hope you keep improving and perfecting your products and service, wish you better!
    5 Stars By Gill from Tanzania - 2016.02.28 14:19
    It can be said that this is a best producer we encountered in China in this industry, we feel lucky to work with so excellent manufacturer.
    5 Stars By Fiona from Spain - 2015.06.18 17:25