Austenitic Stainless Steel（Austenitic Stainless Steel）due to its excellent corrosion resistance, low temperature resistance, good weldability and non-magnetic properties, is widely used in the field of petroleum exploration and development of oil and gas fields, especially in...
Austenitic Stainless Steel（Austenitic Stainless Steel）due to its excellent corrosion resistance, low temperature resistance, good weldability and non-magnetic properties, is widely used in the field of petroleum exploration and development of oil and gas fields, especially in the conditions of high corrosiveness, high chloride ion content and low temperature.
Main application scenarios:
1. Oil drilling and logging equipment
Components used:
(1).Logging tool bodies
(2).Measurement While Drilling (MWD) Tools
(3).Borehole sensor housings
(4).Directional Drilling Tools
Widely used materials:304,304L,316L,321,347
(1).Good corrosion resistance
(2).Non-magnetic properties that will not interfere with logging signals
(3).Ability to withstand high well pressure
2.Protective tubes for instrumentation in oil exploration
Typical products:
(1).Impulse tubes for instruments
(2).Capillary tubes
(3).Impulse lines
(4).Hydraulic control lines
Widely used materials:316L,904L
Application scenarios:
(1).Offshore drilling platforms
(2).Floating production, storage and offloading units (FPSO)
(3).Wellhead control systems
Specifications:
(1).Resistance to sea corrosion
(2).Chloride ion corrosion resistance
(3).Long service life
3. Pipeline systems of offshore oil platforms
Applications:
(1).Pipelines for injection of chemical reagents
(2).Hydraulic control lines
(3).Fire protection systems piping
(4).Instrumentation air systems
Common materials:316L,904L,Super Austenitic Stainless Steel
Benefits:
(1).Resistance to corrosion in marine atmosphere
(2).Salt spray resistance
(3).Low maintenance costs
4.Auxiliary components of Xmas tree and wellhead equipment
Applicable parts:
(1).Instrument fittings
(2).Control pipelines
(3).Protective covers
(4).Small piping components for fluid transport
Widely used materials:316L,317L
Basic requirements:
(1).Resistance to hydrogen sulfide corrosion
(2).Resistance to carbon dioxide corrosion
(3).Resistance to stress corrosion cracking
5.LNG and projects for oil and gas production at ultra-low temperatures:One of the most important advantages of austenitic stainless steel is its excellent low temperature properties.
Equipment used:
(1).Pipelines for LNG transportation
(2).Cryogenic fittings
(3).Components of LNG storage tanks
(4).Cryogenic heat exchangers
Widely used brands:304L,316L
Operating temperature:-196 °C
Compared to carbon steel:
(1).Not susceptible to low temperature embrittlement
(2).Keeps good viscosity
6. Testing facilities for petrochemical exploration
Application:
(1).Crude oil analysis equipment
(2).Components for high pressure autoclaves
(3).Corrosion testing facilities
(4).Sampling systems
Main advantages:
(1).Resistance to acidic environments
(2).Easy to clean
(3).No sample contamination
Common grades of austenitic stainless steel in oil exploration
| Steel grade | Characteristics | Typical Application |
| 304 | Universal type | Instrument housings, conventional piping |
| 304L | Low carbon type | Welded structural elements |
| 316 | Contains molybdenum | Equipment for the marine environment |
| 316L | Most widely used | Instrument tubes, hydraulic tubes |
| 317L | High corrosion resistance | High Chloride Environments |
| 321 | Titanium stabilized | High Temperature Logging Equipment |
| 347 | Niobium stabilized | High Temperature High Pressure Equipment |
| 904L | Superaustenitic | Offshore platforms and highly corrosive environments |
Chemical composition of stainless steel
| Steel grade | C | Si | Mn | P | S | Cr | Ni | Mo | Ti |
| SUS304 | ≤0.08 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.030 | 18.0-20.0 | 8.0-10.5 | - | - |
| SUS304L | ≤0.03 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.030 | 18.0-20.0 | 8.0-12.00 | - | - - |
| 316L | ≤0.03 | ≤0.075 | ≤2.00 | ≤0.045 | ≤0.030 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | - |
| 321 | ≤0.08 | ≤0.75 | ≤2.00 | ≤0.045 | ≤0.030 | 17.0-19.0 | 9.0-12.0 | - | ≥5×C |
Product range
We can produce various types of stainless steel tubes with outer diameter from 0.4mm to 16.0mm and wall thickness from 0.05mm to 1.2mm. We have a significant advantage in the production of small diameter tubes and thin-walled tubes, which allows us to fully meet the stringent requirements of the precision manufacturing industry.
| Outer diameter OD (mm) | Wall thickness WT (mm) | 0.05-0.1 | 0.1-0.12 | 0.12-0.15 | 0.15-0.18 | 0.18-0.2 | 0.2-0.25 | 0.25-0.6 | 0.6-0.8 | 0.8-1.2 |
| 0.4 | V | V | V | |||||||
| 0.5 / 0.6 | V | V | V | V | ||||||
| 0.7 | V | V | V | V | ||||||
| 0.8 / 0.8-1.0 | V | V | ||||||||
| 1.0-2.0 | V | V | V | V | V | |||||
| 2.0-2.5 | V | V | V | V | V | |||||
| 2.5-3.0 | V | V | V | V | V | V | ||||
| 3.0-5.0 | V | V | V | V | V | |||||
| 5.0-7.0 | V | V | V | |||||||
| 7.0-10.0 | V | V | V | |||||||
| 10.0-16.0 | V | V |
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