China Square Hollow Steel Tubing Manufacturers - Large Diameter 4Inch 5Inch 6Inch 7Inch 8Inch 10Inch 12Inch to 48Inch Steel Pipes – TOPTAC

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We are one of the leading manufacturers of steel pipe.We have our own factory! Details of Large diameter 4inch 5inch 6inch 7inch 8inch 10inch  12inch to 48inch steel pipes: Material Q195,Q215,Q235, Q345 Ends 1) Plain2) Beveled3) Thread with Coupling or cap End protector 1) Plastic pipe cap2) Iron protector Technique Electronic Resistance Welded (ERW )Electronic Fusion Welded (EFW)Double Submerged Arc Welded (DSAW) Packing Packed in bundles by containers, in bulk, oiled in bundles...


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"Quality 1st, Honesty as base, Sincere company and mutual profit" is our idea, in an effort to create consistently and pursue the excellence for Steel Plate, Erw Square Tube, Galvanized Tube, We warmly welcome friends from all walks of life to cooperate with us.
China Square Hollow Steel Tubing Manufacturers - Large Diameter 4Inch 5Inch 6Inch 7Inch 8Inch 10Inch 12Inch to 48Inch Steel Pipes – TOPTAC Detail:

We are one of the leading manufacturers of steel pipe.We have our own factory!

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Details of Large diameter 4inch 5inch 6inch 7inch 8inch 10inch  12inch to 48inch steel pipes:

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Material Q195,Q215,Q235, Q345
Ends 1) Plain2) Beveled3) Thread with Coupling or cap
End protector 1) Plastic pipe cap2) Iron protector
Technique Electronic Resistance Welded (ERW )Electronic Fusion Welded (EFW)Double Submerged Arc Welded (DSAW)
Packing Packed in bundles by containers, in bulk, oiled in bundles by containers, PE clothes or according to different request.
Welded Line Type Longitudinal
Inspection With Hydraulic Testing, Eddy Current , Infrared Test
Delivery 1) Container2) Bulk carrier
MOQ 10 tons
Delivery time 7-20 days after received the advance payemnt
Country  of origin Fancyco,Tianjin, China
Payment T/T, L/C, Western Union, D/P, D/A, O/A
Price term FOB, CFR, CIF
Main market North America, South America, Europe, Middle East, Southeast Asia, Australia and Central Asia and many other countries and regions.
Others Fitting as screws and flange also can be supplied

 Normal Specification of Large Diameter 4Inch 5Inch 6Inch 7Inch 8Inch 10Inch  12Inch to 48Inch Steel Pipes

Outer Diameter Wall Thickness Length
Inch mm mm meter
1/2″ 21.3mm 0.6mm-3.0mm 0.3m-12m
3/4″ 26.9mm 0.6mm-3.0mm 0.3m-12m
1″ 33.4mm 1.0mm-3.0mm 0.3m-12m
1-1/4″ 42.3mm 1.0mm-4.0mm 0.3m-12m
1-1/2″ 48.3mm 1.0mm-4.0mm 0.3m-12m
2″ 60.3mm 1.5mm-4.0mm 0.3m-12m
2-1/2″ 76.1mm 1.5mm-4.0mm 0.3m-12m
3″ 88.9mm 1.5mm-9.5mm 0.3m-12m
4″ 114.3mm 2.0mm-9.5mm 0.3m-12m
5″ 141.3mm 3.0mm-9.5mm 0.3m-12m
6″ 168.3mm 3.0mm-12.0mm 1.0m-12m
8″ 219.1mm 3.2mm-12.0mm 1.0m-12m
10″ 273mm 3.2mm-12.0mm 1.0m-12m
12″ 323.8mm 6.0mm-15.0mm 1.0m-12m
14″ 355.6mm 8.0mm-15.0mm 1.0m-12m
16″ 406.4mm 8.0mm-20.0mm 1.0m-12m

Standard out diameter for Large Diameter 4Inch 5Inch 6Inch 7Inch 8Inch 10Inch  12Inch to 48Inch Steel Pipes:

Nominal Pipe Sizes Outside Diameters (mm)
DN INCH ASME JIS DIN GB/T
15 1/2″ 21.3 21.7 21.3 20.0
20 3/4″ 26.7 27.2 26.9 25.0
25 1″ 33.4 34.0 33.7 32.0
32 1.1/4″ 42.2 42.7 42.4 42.0
40 1.1/2″ 48.3 48.6 48.3 48.0
50 2″ 60.3 60.5 60.3 60.0
65 2.1/2″ 73.0 76.3 76.1 76.0
80 3″ 88.9 89.1 88.9 88.0
90 3.1/2″ 101.6 101.6   102.0
100 4″ 114.3 114.3 114.3 114.0
125 5″ 141.3 139.8 139.7 140.0
150 6″ 168.3 165.2 168.3 1.0
200 8″ 219.1 216.3 219.1 219.0
250 10″ 273.0 267.4 273.0 273.0
300 12″ 323.8 318.5 323.9 325.0
350 14″ 355.6 355.6 355.6 355.0
400 16″ 406.4 406.4 406.4 406.0
450 18″ 457.2 457.2 457.0 457.0
500 20″ 508.0 508.0 508.0 508.0
550 22″ 558.8 558.8   558.0
600 24″ 609.6 609.6 610.0 610.0
650 26″ 660.4 660.4   660.0
700 28″ 711.2 711.2 711.0 711.0
750 30″ 762.0 762.0   762.0
800 32″ 812.8 812.8 813.0 812.0
850 34″ 863.6 863.6   863.0
900 36″ 914.4 914.4 914.0 914.0
950 38″ 965.2 965.2   965.0
1000 40″ 1016.0 1016.0 1015.0 1015.0
1050 42″ 1066.8 1066.8   1066.0
1100 44″ 1117.6 1117.6   1117.0
1150 46″ 1108.4 1108.4   1168.0
1200 48″ 1219.2 1219.2 1220.0 1219.0

Specializing in the export of Large Diameter 4Inch 5Inch 6Inch 7Inch 8Inch 10Inch  12Inch to 48Inch Steel Pipes.

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 Packaging ofLarge Diameter 4Inch 5Inch 6Inch 7Inch 8Inch 10Inch  12Inch to 48Inch Steel Pipes:

Standard export bundle wrapped with strong steel strip for seaworthy or as per customers requirement

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Product detail pictures:

China Square Hollow Steel Tubing Manufacturers - Large Diameter 4Inch 5Inch 6Inch 7Inch 8Inch 10Inch  12Inch to 48Inch Steel Pipes – TOPTAC detail pictures

China Square Hollow Steel Tubing Manufacturers - Large Diameter 4Inch 5Inch 6Inch 7Inch 8Inch 10Inch  12Inch to 48Inch Steel Pipes – TOPTAC detail pictures

China Square Hollow Steel Tubing Manufacturers - Large Diameter 4Inch 5Inch 6Inch 7Inch 8Inch 10Inch  12Inch to 48Inch Steel Pipes – TOPTAC detail pictures

China Square Hollow Steel Tubing Manufacturers - Large Diameter 4Inch 5Inch 6Inch 7Inch 8Inch 10Inch  12Inch to 48Inch Steel Pipes – TOPTAC detail pictures

China Square Hollow Steel Tubing Manufacturers - Large Diameter 4Inch 5Inch 6Inch 7Inch 8Inch 10Inch  12Inch to 48Inch Steel Pipes – TOPTAC detail pictures

China Square Hollow Steel Tubing Manufacturers - Large Diameter 4Inch 5Inch 6Inch 7Inch 8Inch 10Inch  12Inch to 48Inch Steel Pipes – TOPTAC detail pictures


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With the "Client-Oriented" business philosophy, a rigorous quality control system, advanced manufacturing equipment and a strong R&D team, we always provide high quality products, excellent services and competitive prices for China Square Hollow Steel Tubing Manufacturers - Large Diameter 4Inch 5Inch 6Inch 7Inch 8Inch 10Inch 12Inch to 48Inch Steel Pipes – TOPTAC , The product will supply to all over the world, such as: Dubai, Kyrgyzstan, Swedish, We accomplish this by exporting our wigs directly from our own factory to you. The goal of our company is to get customers who enjoy coming back to their business. We sincerely hope to cooperate with you in the near future. If there's any opportunity, welcome to visit our factory!!!
  • Product variety is complete, good quality and inexpensive, the delivery is fast and transport is security, very good, we are happy to cooperate with a reputable company!
    5 Stars By Elsa from Belgium - 2017.08.18 18:38
    A good manufacturers, we have cooperated twice, good quality and good service attitude.
    5 Stars By Jodie from Stuttgart - 2018.09.23 17:37
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