A335 P5,P22,P91 Cracking Tubes are used for furnace tubes, heat exchangers and connecting pipes in petroleum refineries.
A335 specifies seamless ferritic alloy steel nominal tubes for high temperature use, grades P5,P22,P91 etc..
P5 is a low carbon chromium-molybdenum alloy steel with excellent toughness and weldability. It has a minimum tensile strength of 586 MPa (85 ksi) at room temperature and good ductility due to its low carbon content (less than or equal to 0.20%). In addition, it has good impact toughness even at low temperatures (-150°F). In addition, this steel can be hardened by the tempering process, which further increases its strength and wear resistance.
P22 is a chromium-molybdenum heat-resistant steel, its metallurgical organisation is bainite + ferrite organisation, in the welding process
Hardenability in the welding process, easy to produce cold cracks, hot cracks, reheat cracks and other welding defects.
P91 is a martensitic heat-resistant steel, not only has a high resistance to oxidation and high temperature steam corrosion resistance, but also has a good impact toughness and high and stable long-lasting plasticity and heat strength properties
In the use of temperature below 620C, its permissible stress is higher than the austenitic stainless steel; above 550C, the recommended design permissible stress is about twice as much as P9 and 2.25Cr-1Mo steel.
When P91 alloy pipe is welded without preheating conditions, the chance of cracking is 100%. It can be said that P91 alloy steel pipe has a greater tendency to cold cracking, it is generally believed that when the preheating temperature is increased to 200-250C, it can effectively avoid the production of cold cracking.
A335 P5 and P22 as well as P91 have high temperature resistance and can be used as oil cracking pipes.
GNEE Group specialises in the production of A335 P5 Petroleum Cracking Pipe, A335 P22 Petroleum Cracking Pipe, A335 P91 Petroleum Cracking Pipe, if you need it, please let us know immediately.
A335 Seamless Steel Pipe for Petroleum Cracking Specification
| Model NO. | Alloy Steel Pipe |
| Section Shape | Round |
| Thickness | 7.92mm-50.8mm |
| Length | SRL, DRL, 5.8m, 11.8m |
| Steel Grade | Grade A, Grade B, Grade C, X42, X52 |
| Surface | Bared Black Painting, Galvanized, Coating |
| Inspection | With Hydraulic Testing, Ultrasonic Testing or X-Ra |
| Date of Delivery | 8-20 Days According to The Quantity |
| Port of Shipment | Tianjin |
| Specification | A106 A53 A105 Carbon Steel Pipe |
| Origin | China |
| Production Capacity | 1000 Ton/Month |
FAQ
Q:What about product pricing information?
Prices vary due to changes in raw material prices on a regular basis.
Q:Is it possible to send samples?
Of course, we offer free samples and express shipping to customers all over the world.
Q:Do you offer a service for customized products?
Yes, we can produce according to your specifications and drawings.
Q:Can I pay you a visit at your factory?
Customers from all around the world are welcome to visit our factory.
Q:Can you assist me in importing steel products for the first time?
Yes, we have shipping agent who will arrange the shipment with you.
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