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GB9948 Cold Drawn 20# Alloy Carbon Pipe Petroleum Cracking Steel Tube

Minimum Order Quantity : 2 tons Price : negotiable
Packaging Details : in wooden boxes or in hexagonal bundles Delivery Time : 30-45 Days
Payment Terms : L/C, D/A, D/P, T/T, Western Union, MoneyGram Supply Ability : 20000 Tons per Year
Place of Origin: China Brand Name: Torich
Certification: ISO14001:2008, TS16949, CE PED, TUV, API,BV Model Number: GB9948

Detail Information

Product Name: GB9948 20# Alloy Carbon Pipe Petroleum Cracking Seamless Steel Tube Material: 10#.20# 12CrMo 15CrMo 12CrlMo 12CrlMoV 12Cr2Mo
Shape: Round Surface: Oiled
Usage: Petroleum Cracking OD: 20-500mm
WT: 2-50mm Length: 4-12m
High Light:

seamless steel pipe

,

seamless carbon steel tube

Product Description

GB9948 20# Alloy Carbon Pipe Petroleum Cracking Seamless Steel Tube

 

Production Method of Steel:

High quality carbon sructural steel and alloy structural steel should be handled through electric arc furnace and refining outside the furnace and vacuum refining processing.,also can be producetd by electroslag heavy solvent method.Stainless steel should use electric arc furnace and refining outside the furnace or oxygen converter refining outside the furnace,also can be producetd by electroslag heavy solvent method.

 

 

Production Method of Steel:

Hot Rolling(Extrusion,Expansion)or Cold Drawn(Rolling).

 

Size:

OD:20-500mm

WT:2-50mm

Length:4-12m

 

Delivery State:

Steel pipes should be delivery with hot treatment state.

 

Application:

Petrochemical industry furnace tube

Heat exchanger tube

Seamless steel tube for pressure pipe use

 

The Tolerances of Outer Diameter and Wall Thickness Unit:mm

Sort Code Manufacuring Method Nominal Size Tolerances
Common Level High Level
W-H Hot Rolling (Extrusion) Outer Diameter D ≤54 ±0.50 ±0.30
>54~325 ±1%D ±0.75%D
>325 ±1%D -
Wall Thicknass S ≤20

+15%S

-10%S

±10%S
>20

+12.5%S

-10%S

±10%S
Hot Expand Outer Diameter D All ±1%D
Wall Thicknass S All ±15%S
W-C Cold Drawn(Rolling) Outer Diameter D ≤25.4 ±0.15
>25.4~40 ±0.20
>40~50 ±0.25
>50~60 ±0.30
>60 ±0.75%D ±0.5%D
Wall Thicknass S ≤3.0 ±0.3 ±0.2
>3.0 ±10%S ±7.5%S

 

           Testing items and sampling quantity of steel tubes

Number Testing items Sampling quantity
1 Chemical composition 1 sample from each furnace
2 Tensile test 1 sample from each of two steel tubes on each batch
3 Hardness test 3 samples taken on 2 steel tubes on each batch
4 Impact test All
5 Hydraulic test 1 sample from each of two steel tubes on each batch
6 Flattening test 2 samples taken on 2 steel tubes on each batch
7 Bending test 1 sample taken on 2 steel tubes on each furnace
8 Flaring test 2 samples taken on 2 steel tubes on each batch
9 Macroscopic examination 1 sample taken on 2 steel tubes on each furnace
10 Non-metallic inclusions 1 sample taken on 2 steel tubes on each furnace
11 Eddy current testing All
12 Magnetic flux leakage detection All
13 Ultrasonic testing All
14 Intergranular corrosion test 1 sample from each of two steel tubes on each batch
GB9948 Cold Drawn 20# Alloy Carbon Pipe Petroleum Cracking Steel Tube 0GB9948 Cold Drawn 20# Alloy Carbon Pipe Petroleum Cracking Steel Tube 1GB9948 Cold Drawn 20# Alloy Carbon Pipe Petroleum Cracking Steel Tube 2GB9948 Cold Drawn 20# Alloy Carbon Pipe Petroleum Cracking Steel Tube 3

 

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