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20# Seamless Steel Pipe For Liquid Service

Our company is specialized for producing and supplying high quality seamless steel pipes. And pipes of standard size and customized size can be choosed by clients. We will provide best service for clients.

Description

GB/T 8163 20# seamless steel pipe for liquid service


Used to transport the petroleum, the natural gas,and other general fluid.
Seamlesss steel tube of petroleum cracking.

Seamless steel pipe is one of hot sale products in our company. In our company, standard size and customized size can be choosed by clients.

We can provide one-stop service for clients from inquiry, quote, production to packing, shipment, after-sales feedback.


20# seamless steel pipe introduction

Tolerance of outer diameter (unit: mm)


Type of steel pipes
tolerance
hot rolled (Extruded, hot expand)
±1%D or ±0.50, Whichever is greater
cold drawn(rollded)
±1%D or ±0.50, Whichever is greater


Thickness tolerance of Hot rolled(extruded, hot expand) steel pipe (unit:mm)


Type
OD
S/D
Tolerance
hot rolled (Extruded)
≤102
-

±12.5%S or ±0.40,

whichever is greater

>102
≤0.05

±15%S or ±0.40,

whichever is greater

>0.05-0.10

±12.5%S or ±0.40,

whichever is greater

>0.10

+12.5%S

-10%S

hot expand
-
±15%S


Thickness tolerance of cold drawn (rolled) steel pipe (unit:mm)


Type
Thickness
Tolerance
Cold drawn (rolled)
≤3

+15%S, -10%S or ±0.15,

whichever is greater

>3
+12.5%S, -10%S


Mechanical properties


Grade
Tensile strength, Rm/MPa
Yield point, ReL/MPa
Elongation, A/%
Thickness/mm
≤16
>16-30
>30

20#
410-530
245
235
225
20


Chemical composition (%)


Grade
C
Si
Mn
P, ≤
S, ≤Cr, ≤Ni, ≤Cu, ≤
20#
0.17-0.23
0.17-0.37
0.35-0.65
0.030
0.030
0.25
0.30
0.25


Packing

From 1/8" to 6" Small diameter steel pipes: in bundles with steel strip, at least three steel strips for each bundle.

Larger than 6" steel pipes: Each pipe had 2PCS of cotton ropes wrapped around at pipe ends for protection.

Each pipe end is protected by plastic caps or protector.

Other types packing way can be advised by clients.

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