high- pressure boiler pipe

seamless steel pipe
Tolences of Outer Diameter and Wall Thickness

Standard
(mm) Tolences of outer diameter
(mm) wall thickness
(mm)
outer diameter
(mm)
Tolences of outer diameter
≤130mm outer diameter≤130mm
>130mm
outer diameter>130mm
GB/T81621999
>50
+1%
S≤4
420
S>20
S±12.5%
+15% 10%
±12.5%
GB/T81631999
ALL
+1%,min +0.5mm
Tolences of hot-finished steel pipe
ALL
+15% 10%
ASTM A53
<48.3
>60.3
+0.4mm 0.79mm
+1%
ALL
±12.5%
ASTM A106
<48.3
48.3114.3
>114.3
+0.4mm 0.79mm
+0.79mm
+1.59mm 0.79mm
ALL
±12.5%
GB99481988
≤159
>159
+1%
+1.25%
S≤20
S>20
±12.5%
+10%



Round steel pipes. Schedule pipes, mild steel & carbon steel.
(1)Technique:hot rolled.
(2)Surface protect :varnish or black painting to prevent rust.or other paintings.
Black surface finish, galvanized. beveled end.
(3)Place of origin:Tianjin,China.
(4)Application:seamless steel pipes for equipment,pipelines,vessels,pipe fittings and so on.
(5)Packing:bundles,seaworthy wooden cases,container.