Home>Products>High-frequency welded-tube series
 
 
 
 
  Introduction
 
 
  High-frequency welded tubes are straight seam steel tubes that use high-frequency electric current bring assem-bly effect to weld. These products are widely used in low-pressure current transmission、Metal structures、hard-ware products、container manufacturing、construc-tional projects and machinery & electric industries etc.
 
  Product's characteristic
 

Round Welded Tubes
A. Square-shaped welded tubes:
1. Small radius of bull nose curves;
2. Perpendicularity of adjacent edges (within 1.5 degrees of allowance);
3. Small error allowance for edge length;
4. Good straightness of tubes (with bending <1mm/m, full length flexibility<0.25%);
5. No twisting (full length twisting no more than 0.08%);
6. Smooth surfaces, non-existence of snaps, laps, burn-throughs, dislocation or other defects for the welding seams; 
B. Round-shaped welded tubes:
(1) Manufactured and inspected in accordance with the state state standards of GB/T13793-1992 <Straight Seam Electric Welded Steel Tubes>;
(2) Specifications for new products can be discussed and ordered for customer options.
 
  Main product's specification
 
Round Tubes           
Rectangual/square Tubes
Diameter
(mm)
Wall thickness (mm) Specification
(mm)
Wall thickness (mm)
219
165
140
114
89
76
60
48
42
34
25
21
19
3.5~6.0
2.0~-5.5
1.8~4.5
1.5~4.5
1.5~4.0
1.5~4.0
1.2~3.8
1.2~3.8
1.0~3.0
1.0~3.0
0.8~2.5
0.8~2.5
0.8~2.0
120x150
120x120
100x150
60x60
50x100
50x50
40x80
40x60
40x40
30x40
25x25
20x30
20x20
2~5.5
2~5.5
2~5.5
1.5~4.5
1.5~4.5
1.5~4.5
1.5~4.5
1.5~4.5
0.8~3.0
0.8~3.0
0.8~2.5
0.8~2.5
0.8~2.5
 
  The schematic drawing of the technological flow sheet
 
 
 
 
Copyright©Guangdong Yingquan Steel Products Co.,Ltd All rights reserved.