Sản phẩm
Grade Nominal Size Outside Diameter Wall Thickness Weight Pcs/bdl
in. A Max Min Plain Ends Screwed and Socketed  
In. mm In.  mm In.  mm kg/ft kg/m kg/ft kg/m
Light  3/8 10 0,673 17,1 0,657 16,7 0,071 1,8 0,204 0,67 0,206 0,676 217
 1/2 15 0,843 21,4 0,827 21 0,079 2 0,289 0,947 0,291 0,956 217
 3/4 20 1,059 26,9 1,039 26,4 0,091 2,3 0,422 1,384 0,424 1,39 127
1    25 1,331 33,8 1,307 33,2 0,102 2,6 0,604 1,981 0,61 2 91
1 1/4 32 1,673 42,5 1,65 41,9 0,102 2,6 0,774 2,539 0,783 2,57 61
1 1/2 40 1,906 48,4 1,882 47,8 0,114 2,9 0,985 3,232 0,997 3,27 61
2    50 2,37 60,2 2,346 59,6 0,114 2,9 1,242 4,076 1,265 4,15 37
2 1/2 65 2,992 76 2,961 75,2 0,126 3,2 1,741 5,713 1,777 5,83 37
3    80 3,492 88,7 3,461 87,9 0,126 3,2 2,047 6,715 2,1 6,89 19
4    100 4,484 113,9 4,449 113 0,142 3,6 2,974 9,756 3,048 10 19
Medium                          
Heavy                          

For city & industrial water, irrigation & agriculture water, oil & gas supply, sprinkler, fire hydrant, ship piping ect…

Chemical requirement

C Mn P S
Light 0,2 1,2 0,045 0,045
Medium 0,2 1,2 0,045 0,045
Heavy 0,2 1,2 0,045 0,045

Physical requirement

Tensile Strength  Psi (Mpa) Yield Strength Psi (Mpa) Elongation Psi(Mpa)
Light 320 ~460 N/mm2
33~47.2 kg/mm2)
Min. 195 N/mm2
(20kg/mm2)
Min. 20
Medium
Heavy

Test Requirement

  Flattening test Bend test Hydrostatic test
Light Apply for NB>DN50( 2 in. )
Weld portion H=0.75D
The other side of Weld Portion H=0.6D
(The Weld shall be located at 90 deg.)
Apply for  NB<DN50 Ungavalnized Tubes At Cold 180 Deg.x 6D
Galvanized tubes 90Deg.x 8D
p=53kgf/cm2 (50 bar)
Medium
Heavy

Permissible variations in dimensions

  Outside Diameter wall thickness length Height of inside flash
Light Specified respectively in size   * Random Lengths 4m ~7m
* Mill Lengths Min. 6.4m : +150mm, -0
*Approximate Lengths: +- 150mm
* Exact Lengths: +6mm, -0
 
Medium  
Heavy  

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