Durable 316 Seamless Stainless Steel Tubing High Inside Surface Cleanness

Durable Seamless 316 Stainless Steel Tubing , 316l Stainless Steel Pipe

Description

Alloy 316L is a chromium-nickel austenitic stainless steel with an addition of molybdenum and reduced carbon content. The addition of molybdenum provides improved resistance to pitting and crevice corrosion in environments containing halides such as chlorides when compared to so-called conventional 18 chromium 8 nickel austenitic stainless steels such as 304L. The reduced carbon content minimizes harmful chromium carbide precipitation during welding and thereby improves resistance to intergranular corrosion. Austenitic stainless steels such as 316L are susceptible to stress corrosion cracking (SCC) in environments containing chlorides and other halides. Alloy 316L is generally used in oil and gas production environments which do not contain oxygen and have limited amounts of chlorides and hydrogen sulfide. Consult ISO 15156-3, Table A.2 for the limits regarding alloy 316L in hydrogen sulfide-containing environments for oil and gas production.

Corrosion Resistance

● Organic acids at high concentrations and moderate temperatures

● Inorganic acids, e.g. phosphoric and sulphuric acids, at moderate concentrations and temperatures. The steel can also be used in sulphuric acid of concentrations above 90% at low temperature.

● Salt solutions, e.g. sulphates, sulphides and sulphites

● Caustic environments

Austenitic steels are susceptible to stress corrosion cracking. This may occur at temperatures above about 60°C (140°F) if the steel is subjected to tensile stresses and at the same time comes into contact with certain solutions, particularly those containing chlorides. Such service conditions should therefore be avoided. Conditions when plants are shut down must also be considered, as the condensates which are then formed can develop conditions that lead to both stress corrosion cracking and pitting.

TP316L has a low carbon content and therefore better resistance to intergranular corrosion than steels of type TP316.

Standards and Specifications

ASTM A269, Standard Specification for Seamless and Welded Austenitic Stainless Steel Tubing for General Service

Meets the material limits for 316L austenitic stainless steel listed in ISO 15156-3, Table A.2

Since 1999, Meilong Tube Co., Ltd. has produced both long coils and straight length of stainless steel and high nickel alloy tubing for numerous oil and gas applications, including hydraulic power, monitoring and control equipment, instrumentation, injection lines, down-hole safety valve control, subsea umbilical applications. Unique manufacturing capabilities and processes allow Meilong to produce the longest continuous length control line tubing available in stainless steels and high nickel alloys.

Our coiled tubing is available in a number of high performance corrosion resistant stainless steels and high nickel alloys, including 300 series, Incoloy, Inconel, capable of withstanding a variety of severe environmental conditions.

We specialize in manufacturing small diameter tubing ranging from 0.125 inch to 1 inch outside diameter (3.18mm to 25.4 mm) and a variety of wall thickness. Besides straight length instrumentation tubing, tubing is level wound coiled on various size spools, and products are tested and evaluated for specific applications before delivery. Our engineering staff welcome the opportunity to work with customers to solve special problems.

Vacuum annealing

Meilong takes special care during manufacturing to assure ID and OD cleanliness of instrumentation tubing. Vacuum annealing insures volatility of metallic oxides and removal of any residual degreasing solvents or drawing lubricants. Vacuum annealing our stainless steel tubing insures a bright, cosmetically appealing surface as well as excellent mechanical properties.

Meilong commitment to quality excellence

From the time an order is received, sent through the production process, completed, and finally shipped, many levels of inspection occur to reinforce Meilong’s Quality Policy. The job of ensuring quality products extends as far as our machine operators. Meilong operators take ownership over material processed at their stations by measuring for dimensional accuracy and conducting a visual inspection of every piece.

Quality Assurance

Stainless steel tubes are delivered in straight lengths

Steel grades ensures high corrosion resistance

Special eccentricity and controlled hardness is ideal for hydraulic & instrumetation system

High surface smoothness and close dimensional tolerance, polished outside surface is the option

High inside surface cleanness

Tube be eddy current tested. Hydrostatic test is the option

The tube mill is ISO 9001, PED 97/97/23/EC approved

Type 316L, Chemical composition

Application: Standard oil and gas CRA (corrosion resistant alloy)

Tensile strength, min.: 70ksi (485MPa)

Yield strength, min.: 25ksi (170MPa)

Elongation in 2 in., min.: 35%

Production Process

• Order specification (in metric size mm):

6.0 x 1.0

6.0 x 1.2

6.0 x 1.5

8.0 x 1.0

8.0 x 1.2

8.0 x 1.5

10.0 x 1.0

10.0 x 1.2

10.0 x 1.5

10.0 x 2.0

12.0 x 1.0

12.0 x 1.2

12.0 x 1.5

12.0 x 2.0

• Steel grades

Other steel grades or alloy grades are available, e.g. 904L, 317, duplex 2205, alloy 400, alloy 600, alloy 800, alloy 825

Hydraulic & Instrumentation Tubes are important components in hydraulic and instrumentation systems to protect and partner with other components, devices or instruments to secure the safe and trouble-free operations of oil and gas plants, petrochemical processing, power generation and other critical industrial applications.

• Bright annealed

Reduce contamination with smart surface

• Controlled hardness

Effective sealing with ferrules

• End capped

Maintain high cleanness

• Fixed lengths

Efficient work planning & material control

• High roundness

Effective sealing at connections

• High cleanness

Reduce contamination-risks in the system

• 100% eddy-current and hydrostatic tested

Secure high & consistent quality

• 100% PMI tested

Eliminate risk & hazards

• Controlled dimensional tolerances

Secure high performance with other components in the system

• Dual grade & specification marked & certified

Conform to a large variety of technical requirements

Applications

Instrumentation & control lines, safety systems, sampling & analyzer lines, hydraulic systems, pneumatic lines, process impulse lines, signal transmission lines, subsea equipment, fuel & CNG lines, compressors

• Oil and gas
• Petrochemical
• Automotive & rail
• Marine & shipbuilding
• Power generation
• Desalination plants
• Medical & pharmaceutical
• Pulp & paper

Norm Equivalence