| Customization: | Available |
|---|---|
| Type: | Stainless Steel Pipes |
| Standard: | ASTM, AISI, GB, JIS, DIN, EN |
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Seamless Stainless Steel Pipe 304 / 304L / 316 / 316L
We produce seamless stainless steel pipe complying with specification A213, A269, A312, A511, stainless steel grades include 304, 304L, 316, 316L, 321, 347H, 310S, 904L, 2205, annealing pickling, bright annealing condition.
Seamless pipe is applied for General service, Curatorial Industry, Food and beverage Industry, Dorative and construct, Aerospace Industry, Chenmical and Petrochemical, Fluid transport, Water treatment, Boiler, heat exchanger, Oil and gas service, Mechanical and fabrication purpose.
| Type | seamless pipe |
|---|---|
| Specification | A213, A269, A312, A511 |
| Grades | TP304, TP304L, TP316L |
| NPS | 1/8″ - 24″ |
| Sch | Sch5 - Sch160 |
| Length | specific or random |
| Condition | annealing, beight annealing, polishing |
| Form: | round, U bending, coiled |
| Application | heat exchanger, boiler, water, high pressure, ornamental purpose |
| Method | Cold rolling, cold drawn |
There are wide stainless steel material range for seamless pipes, containing Austenitic Stainless Steels, Ferritic Stainless Steels, Martensitic Stainless Steels and Duplex Stainless Steels, 304 / 304L and 316 / 316L grades are most used materials, other stainless steel grades are available.
| C | Mn | P | S | Si | Ni | Cr | Mo | |
|---|---|---|---|---|---|---|---|---|
| TP316 | 0.08 | 2.00 | 0.045 | 0.030 | 1.0 | 11-14 | 16-18 | 2-3 |
| TP316L | 0.035 | 2.00 | 0.045 | 0.030 | 1.0 | 10-14 | 16-18 | 2-3 |
| Grade | C | Mn | P | S | Si | Ni | Cr |
|---|---|---|---|---|---|---|---|
| TP304 | 0.08 | 2.00 | 0.045 | 0.030 | 1.0 | 8-11 | 18-20 |
| TP304L | 0.035 | 2.00 | 0.045 | 0.030 | 1.0 | 8-13 | 18-20 |
| Specifications | Tube Pipe Type | Material | Applications |
|---|---|---|---|
| ASTM A213 | Seamless | Ferric and Austenitic Alloy-Steel | Boiler, Super heater, and Heat-Exchanger |
| ASTM A268 | Seamless and Welded | Ferritic and Martensitic Stainless Steel | General Service |
| ASTM A269 | Seamless and Welded | Austenitic Stainless Steel | General Service |
| ASTM A270 | Seamless and Welded | Austenitic and Ferritic / Austenitic Stainless Steel | Sanitary Tubing |
| ASTM A312 | Seamless, Welded, and Heavily Cold Worked | Austenitic Stainless Steel | high-temperature and general corrosive service |
| ASTM A511 | Seamless | Stainless Steel | Mechanical Tubing |
| ASTM A688 | Seamless and Welded | Austenitic Stainless Steel | Feedwater Heater |
| ASTM A789 | Seamless and Welded | Ferritic/Austenitic Stainless Steel | General Service |
| ASTM A790 | Seamless and Welded | Ferritic/Austenitic Stainless Steel | General Service |
| EN 10216-5 | Seamless | Stainless steel | Pressure purpose |
Seamless pipe is manufactured from steel round bar, the bar is heated and pierced to form a hollow billet, after removing oxide scale, billet is extruded into desired dimention using cold drawing and cold rolling methods, this technology can reduce outside diameter to smaller sizes, and control seamless pipe sizes and tolerances requirement, the inside of the tube can be controlled using a rod (known as rod drawing), a plug (known as plug drawing).
Billet is an extruded hollow tube from pilgered bar, it is actually semi finished tube, and it is needed inspection and pickling to ensure high quality.
Billet sizes are generally reduced to obtain thiner tube sizes, rolling process can achieve this purpose using compression.
Tube rolling is a very precise method of reducing very thin walled or smaller diameter tubes, usually it get a fine surface finish and accurate sizes.
Cold drawing is also cold working method to reduces the diameter by pulling the tube through a die, that device inner size is smaller than the tube, in order to pull the tube into the die, the diameter of tube is reduced to desired size to pass through.
It is also named as heat treatment, this process soften material to make further processing, and improves the overall metallurgical microstructure of the tube.
Tube is heated to a controled temperate, usually 300 series stainless steel minimum annealing solution is 1040 C, annealing relieve stress and make material suitable redrawing.
It is chemical method to clean the tube resulting from cold working or annealing process, generaal using sulphuric acid or nitric acid, putting tube into pickling tank and soaking a right time, not short and not long depending stainless steel grade.
All the material should be tested before shipment as standard or special requirement, there are non-destructive and destrucative tests for option.
Compared to welded tube, seamless pipe has no longitudinal weld seam, seamless tube has 20% higher working pressures under the same material and size condition.
Seamlless pipe can acheive heavy wall pipe for high pressure applications.
Seamless pipe is generally considered to be the most consistent material with the least impurities, because it has no welding seam, and reducing risk on corrosion attack
FAQ
Q. Are you a trading company or a manufacturer?
A: We are a manufacturer as you can see our workshop as above.
Q. What is your payment term?
A:Normally T/T 30% in advance, balance to be paid before delivery.
Q: What is your main market?
A:North America,Greenland,South America,Africa,Southeast Assia, Former Soviet Republics ,East Assia,and Europe.
Q: Can I place sample order to your factory?
A: Yes, Samples can be provided.
Q:What kind of trade terms can you do?
A:EX-WORKS,FOB,CFR,CIF,etc.
Q: How long is your delivery time?
A: Generally it is 5-7 days if the goods are in stock. Or it is 15-20 days if the goods are not in stock, it is accordijng to quantity.
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