What is stainless steel pipe/stainless steel tube？

stainless steel pipe/stainless steel tube

Stainless Steel pipe Manufactuer Process

A. Classification by production method:

(1) Seamless pipes – cold drawn pipes, extruded pipes, cold rolled pipes. Manufacturing process: Smelting>Ingot>Rolling>Sawing>Peeling>Piercing>Annealing>

Pickling>Ash application>Cold drawing>Cutting>Pickling>Storage

The characteristics of seamless steel pipes: It is not difficult to see from the above process flow: firstly, the thicker the wall thickness of the product, the more economical it is

The thinner the wall thickness, the greater its practicality and practicality, the higher its processing cost will be; Secondly, the process of the product determines its limited performance,

General seamless steel pipes have low accuracy: uneven wall thickness, low surface brightness inside and outside the pipe, high sizing cost, and difficult to spot and black spots on the inner and outer surfaces

remove; Thirdly, its detection and shaping must be processed offline. Therefore, it embodies its advantages in high pressure, high strength, and mechanical structural materials

Superiority.

Manufacturing of seamless steel pipes: Seamless steel pipes are made from steel ingots or solid billets that are perforated into tubes, and then hot rolled, cold rolled, or cold drawn.

The specifications of seamless steel pipes are expressed in millimeters of outer diameter * wall thickness. Seamless steel pipes are divided into two categories: hot-rolled and cold-rolled (drawn) seamless steel pipes. Hot rolled seamless pipe outer

The diameter is generally greater than 32mm, with a wall thickness of 2.5-75mm. The diameter of cold-rolled seamless steel pipes can reach 6mm, and the wall thickness can reach 0.25mm. The outer diameter of thin-walled pipes

It can reach a wall thickness of 5mm and less than 0.25mm, with higher dimensional accuracy in cold rolling compared to hot rolling. Hot rolled steel pipes are delivered in hot rolled or heat treated condition; cold rolling

Stainless steel Tube/Pipe Delivery Condition

Delivered in heat treated condition.

1. Hot rolling (extruded seamless steel pipe): Round tube billet → Heating → Piercing → Three roll oblique rolling, continuous rolling or extrusion → Tube detachment → Sizing

(or reducing) → cooling → straightening → hydraulic test (or flaw detection) → marking → warehousing

2. Cold drawn (rolled) seamless steel pipe: round tube blank → heating → perforation → heading → annealing → acid pickling → oil coating (copper plating) → multiple

Pass cold drawing (cold rolling) → blank tube → heat treatment → straightening → water pressure test (flaw detection) → marking → storage

Welded Stainless Steel Tube Manufactuer Process

(2) Welded pipe: Welded steel pipe, abbreviated as welded pipe, is a steel pipe made by welding steel plates or strips after being rolled and formed by a machine and a mold.

1. Steel plate>Splitting>Forming>Fusion welding>Induction bright heat treatment>Inner and outer weld bead treatment>Shaping>Sizing>Eddy current testing>Laser diameter measurement>

Pickling>Storage.

The characteristics of welded steel pipes: It is not difficult to see from the above process flow: firstly, the product is continuously produced online, with thicker walls,

The larger the investment in the unit and fusion equipment, the less economical and practical it will be. The thinner the wall thickness, the corresponding decrease in its input-output ratio

Descending; Secondly, the process of this product determines its advantages and disadvantages. Generally, the welded steel pipe has high precision, uniform wall thickness, and high surface brightness inside and outside the pipe (steel plate

The surface level of the steel pipe determines the surface brightness, and can be arbitrarily sized. Therefore, it embodies its advantages in high-precision, medium and low pressure fluid applications

Economy and aesthetics.

(a) Classification by process – gas shielded welded pipe, arc welded pipe, resistance welded pipe (high-frequency, low-frequency).

(b) Classified by weld seam – straight seam welded pipe, spiral welded pipe.

b: Classified by cross-sectional shape: circular tube, square tube, rectangular tube, elliptical tube

(1) Simple cross-section steel pipes – circular steel pipes, square steel pipes, elliptical steel pipes, triangular steel pipes, hexagonal steel pipes, diamond steel pipes, eight

Angular steel pipes, semi-circular steel circles, others

(2) Complex cross-section steel pipes – unequal hexagonal steel pipes, five petal plum shaped steel pipes, double convex steel pipes, double concave steel pipes, melon shaped steel pipes

Conical steel pipes, corrugated steel pipes, watch case steel pipes, others

c: Classification by wall thickness: thin-walled steel pipes:

Thick walled steel pipe:

d: Classified by purpose: (1) Civil pipes are divided into circular pipes, rectangular pipes, and flower pipes, which are generally used for decoration, architecture, structure, and other aspects;

(2) Industrial pipes: steel pipes for industrial piping, steel pipes for general piping (drinking water pipes), mechanical structures/fluid delivery pipes

Boiler heat exchange pipes, food hygiene pipes, etc. Generally applied in various fields of industry, such as petrochemical, papermaking, nuclear energy, food, beverage

The pharmaceutical and other industries have high requirements for fluid media in pipelines.

e: Market quotation types for stainless steel pipes: pipe blanks, welded pipes, industrial pipes, and sanitary pipes

From the perspective of process flow, the differences between the steel pipes classified above are:

1. Hygienic grade mirror tube process flow:

Tube blank – inspection – peeling – inspection – heating – perforation – acid cleaning – grinding – lubrication and air drying – welding head——

Cold drawing – solid solution treatment – pickling – pickling passivation – inspection – cold rolling – degreasing – cutting – air drying – internal polishing

——External polishing – Inspection – Identification – Finished product packaging

Sanitary (food grade) seamless stainless steel pipe is widely used in pharmaceutical, food, beer, drinking water, biological engineering, chemical engineering, air purification

Aviation, nuclear industry and other national economic construction are widely used in many fields and industries. Sanitary grade stainless steel pipes for general industrial use Ф 14*1mm

to Ф 200*3mm。 Waste management: Ф 65 * 5 to Ф 100*7

2. Industrial Stainless Stee Tube /Pipe Process Flow

Tube blank – inspection – peeling – inspection – heating – perforation – acid cleaning – grinding – lubrication and air drying – welding head——

Cold drawing – solid solution treatment – pickling – pickling passivation – inspection

3. Welding Stainless Steel Tube /pipe process flow:

Unwinding – leveling – end shearing and welding – looper – forming – welding – removal of inner and outer weld beads – pre calibration——

Induction heat treatment – Sizing and straightening – Eddy current testing – Cutting – Hydraulic inspection – Pickling – Final inspection – Packaging

f: According to the main material composition types: 304, 304L, 316, 316L, 301S, 321, 309S, 2205, 17-4PH, Ni10Ti

(Note: The meaning of adding TP before the steel pipe model is TP – precipitation hardening treatment)

2205 alloy (UNS S32305/S31803) is a duplex stainless steel composed of 22% chromium, 3% molybdenum, and 5-6% nickel nitrogen alloy. It has

High strength, good impact toughness, and good overall and local resistance to synergistic corrosion.

Compared with 316L and 317L austenitic stainless steel, 2205 alloy has superior performance in corrosion resistance and crack resistance. It has

High corrosion resistance. Compared with austenite, it has lower coefficient of thermal expansion and higher thermal conductivity.

Compared with austenitic stainless steel, its compressive strength is twice that of 316L and 317L, and designers can reduce its weight by

The cost is also lower.

17-4PH (C: 0.04, Cr: 16.5, Ni: 4.5, Cu: 3.3, Mn: 0.7) alloy is stainless for precipitation, quenching and martensite

Steel, with this grade, has characteristics such as high strength, hardness (up to 3000 C/5000 C), and corrosion resistance. After heat treatment, the product’s

The mechanical properties are more complete, and can reach a compressive strength of up to 1100-1300 mpa (160-190 ksi). This level cannot be used above

At temperatures of 300 0C (572 0F) or very low, it has good corrosion resistance to the atmosphere and diluted acids or salts, and its corrosion resistance

The force is the same as 304 and 430.

Ni10Ti 321 constitutes 0Cr18Ni10Ti

Benefits of Using Stainless Steel Pipes

Stainless steel pipes are a staple in many industries. Their durability and versatility make them a top choice for various applications. From construction to automotive, these pipes offer unmatched benefits.

Their resistance to corrosion ensures longevity, even in harsh environments. This makes them ideal for both residential and commercial use. Stainless steel pipes are also available in different grades and sizes.

Whether you need a 2-inch pipe or specialized stainless steel tubing, there’s a solution for every need. Their aesthetic appeal and recyclability add to their value. Discover why stainless steel pipes are the preferred choice for many professionals.

Why Choose Stainless Steel Pipe?

Stainless steel pipes offer several compelling reasons for their widespread use. They are incredibly resistant to rust and corrosion. This makes them ideal for use in challenging conditions.

The material provides excellent strength-to-weight ratio. This means they are robust yet lightweight, simplifying installation. This balance is beneficial in construction and engineering.

Consider these advantages:

• High corrosion resistance
• Long-lasting durability
• Ease of maintenance

Key Advantages of Stainless Steel Pipes

The durability of stainless steel pipes is one of their prime advantages. They can withstand pressure and harsh conditions, reducing replacement frequency. This extends their lifespan and adds value.

Stainless steel’s non-reactive nature makes it safe for food and water transport. It does not alter the taste or quality of what flows through it. This characteristic is crucial for industries where purity is essential.

Additionally, stainless steel pipes are aesthetically appealing. Their sleek and modern look enhances any project’s visual appeal. This makes them popular for both industrial and decorative purposes.

Here are key benefits:

• Resistant to corrosion
• Non-reactive and safe
• Easy to fabricate

Common Stainless Steel Grades and Sizes

Stainless steel is available in various grades, each with unique properties. Grades like 304 and 316 are among the most common. These grades are chosen based on the specific needs of a project. Grade 304 is often used for its versatility and excellent corrosion resistance. Meanwhile, grade 316 is favored in harsher environments due to its enhanced durability against chemicals and salinity.

Stainless steel pipes are also manufactured in numerous sizes to meet diverse requirements. For instance, a 2-inch stainless steel pipe is popular in many projects due to its balance of strength and flow capacity. Available sizes and dimensions ensure that there is a suitable fit for any application, whether it be for small-scale residential or large industrial undertakings.

Key grades and sizes:

• Grade 304
• Grade 316
• 2-inch pipe size

Popular Applications of Stainless Steel Tubing and Pipe

Stainless steel pipes and tubing serve a myriad of purposes in various industries. They are favored for their strength, durability, and versatility, making them indispensable in many scenarios.

From construction to chemical processing, their applications are vast:

• Automotive exhaust systems
• Food processing plants
• Pharmaceutical manufacturing
• Residential and commercial plumbing
• Marine environments

Long-Term Value and Sustainability

Stainless steel pipes offer impressive long-term value despite their higher initial cost. Their durability reduces the need for replacements, resulting in lower expenses over time.

Moreover, stainless steel is fully recyclable, making it an environmentally friendly choice. Opting for these pipes supports sustainable practices without compromising on quality or performance.

Conclusion

In summary, stainless steel pipes offer unmatched benefits in various applications. Their durability, versatility, and resistance to corrosion make them a top choice.

Choosing stainless steel means investing in quality and long-term savings. Whether for industrial, commercial, or residential uses, these pipes deliver exceptional performance and contribute to sustainable practices.