2205 welded stainless steel pipe
Duplex 2205 is a two-phase, ferritic, austenitic 22% chromium, 3%
molybdenum, 5 to 6% nickel alloyed stainless steel. It is the most
widely used duplex stainless steel grade and is characterized by
high yield strength, double that of the standard austenitic
stainless steel grades. It also demonstrates good fatigue strength,
as well as outstanding resistance to stress corrosion cracking,
crevice, pitting, erosion, and general corrosion in severe
environments.
APPLICATIONS:
Chemical processing, transport and storage – pressure vessels,
tanks, piping, and heat exchangers
Oil and gas exploration and processing equipment – piping, tubing,
and heat exchangers
Marine and other high chloride environments
Effluent scrubbing systems
Pulp and paper industry – digesters, bleaching equipment, and
stock-handling systems
Cargo tanks for ships and trucks
Food processing equipment
Biofuels plants
ElementType 2205 (Wt.%)
Carbon: 0.03 max
Manganese: 2.00 max.
Phosphorus: 0.040 max.
Sulfur: 0.030 max.
Silicon: 1.00 max.
Chromium: 21.00-24.00
Nickel: 4.50-6.50
Nitrogen: 0.08-0.20
Molybdenum: 2.50-3.50
Element (Wt.%)
| Carbon | Manganese | Phosphorus | Sulfur | Silicon | Chromium | Nickel | Nitrogen | Molybdenum |
| 0.03max | 2.00max | 0.040max | 0.030max | 1.00max | 21.00-24.00 | 4.50-6.50 | 0.08-0.20 | 2.50-3.50 |
Mechanical Property
| Material Item | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation | Hardness Rockwell C (HR C) | Hardness Brinell (HB) |
| 2205 | ≥621 | ≥448 | ≥25% | ≤31 | ≤293 |
Surface Treatment
| Surface Treatment | Definition | Application |
| NO.1 | A hot - rolled piece whose surface has been treated by heat
treatment, pickling or the corresponding process | Chemical Tanks, Pipes, Chemical Industry Equipment etc. |
| 2B | After cold rolling, heat treatment, pickling or other equivalent
treatment, the final cold rolling to give appropriate luster | Medical Equipment, Food Industry, Construction Material, Kitchen
Utensils etc. |
| BA | After cold rolling, bright heat treatment is given | Kitchen Utensils, Electric Equipment, Building Construction etc. |
| NO.4 | Products polished with abrasives 150 to 180 as specified in JIS
R6001 | Kitchen Utensils, Building Construction, Medical Equipment etc. |
| HL | After polishing, use the appropriate abrasive size to form a
continuous polishing streak | Building Construction etc. |
| 8K | A mirror-like reflective surface given by polishing with finer
abrasives over 800 mesh | Reflector, Mirror, Interior and exterior decoration etc. |
PIPE
| Commodity | 2205 seamless/welded stainless steel pipe |
| Grade | 2205 |
| OD | 6mm-426mm, or as customized |
| WT | 1mm-30mm, or as customized |
| Length | 5m-7m, or as customized |
| Surface | Pickling, matt, polished, mirror |
| Application | General service industries (petroleummilitary food chemicalpaper
fertilizerfabricaviation and nuclear); Fluid, gas and oil
transport; Pressure and heat transmission; Boilerpressure
vesselheat exchanger and condenser |
| Delivery Time | 7-30 days, according to quantity |
| Price Terms | FOB/ CFR/ CIF |
| Package | In bundles, water proof packing, in wooden case, or as per
customers’ requirement |
FAQ
Q1: What is your major market?
A1: 95% of our tubes export. We mainly sell to America, Canada,
Australia, Japan, Russia, Germany, France, Dubai, Brazil, Chile,
India, Thailand, South Africa, Egypt, Nigeria, etc.
Q2: What's the annual output?
A2: We can produce more than 21,000 tons stainless steel tubes in a
year.
Q3: What is your welding method?
A3: All of our tubes are welded by TIG welding methods. Our tubes
can get fully welding and smooth inner welding, without blisters,
leak welding or black line. All of our tube are good for tube
bending.
Q4: How do you control the quality during the polishing process?
A4: 1)As for the mirror polish square/rectangular tube, we will
polish it as least four times.
2)During the polishing processing, we set a special sanding wheel
to polish the welding part.
3)To avoid scratches, after polishing, the tubes will be lay out on
a steel crate then we could lift the whole steel crate instead of
the tube.
4)On the other hand, we use the gunny bags to protect the tube's
surface when the tube laying-out.
Q5: How do you inspect the tubes?
A5: The Quality inspectors inspect the tubes during each production
processes from raw material, tube welding, polishing, packaging.
1) Before the production of each machine, we will have the first
checked and record the data.
2) During the production, our inspector and engineer have been
carefully moniting and we record the data every two hours.
Q6: What is the MOQ?
A6: 2ton.
Q7: What’s the delivery time for the tubes normally in your
company?
A7: 20-30 days for 1-4 containers base on the how many items.
Q8: What payment terms you can deal with?
A8: Mostly we deal with TT terms and L/C,for L/C we need to know
which bank to open the L/C and after checking the bank information
to decide whether to accpet the L/C.If you have other preference,
please negotiate.
Q9: Could you print our company logo or information on the tubes
plastic bag and the outside package also?Is there extra cost for
it?
A9: We can follow customer’s request to print your own information
plastic bag for quantity at least 1 container(22-26 tons), and we
won’t charge the extra cost.
