Alloy Steel Fittings 14" Sch120 Astm A234 Wp22 90deg Elbow
Alloy thick wall elbow, also known as stamping elbow, also belongs
to elbow type. Alloy thick wall elbow is a steel elbow formed by
hot pressing or forging. Its connection form is directly welded
elbow and steel pipe.
Production process flow of alloy thick wall elbow:
Firstly, a polygonal ring shell with polygonal cross section or a
polygonal sector shell with closed end is welded. After the
interior is filled with pressure medium, apply internal pressure.
Under the action of internal pressure, the cross section gradually
changes from polygon to circle, which is called annular shell.
According to the requirements, the annular shell can be cut into 4
elbows of 90 degrees or 6 elbows of 60 degrees or other
specifications. This process is applicable to the case that the
ratio of pitch diameter to elbow inner diameter of any
specification is greater than 1.5.
P91 Chemical composition and mechanical properties |
Carbon | Manganese | Phosphorus | Sulfur | Silicon | Chromium | Molybdenum | Nickel |
0.08-0.12 | 0.30-0.60 | <0.02 | <0.01 | 0.20-0.50 | 8.0-9.5 | 0.85-1.05 | <0.4 |
Tensile strength MIN (MPa) | 620 | Yield strength MIN (MPa) | 415 |
Alloy elbows are mainly used to connect pipe fittings in pipe
installation and to connect elbows. Connect two pipes of the same
nominal diameter so that the pipe bends 90 ° or other angles. Alloy
elbow is the general name of all kinds of elbows, with a variety of
materials, such as carbon steel, manganese steel, nickel steel,
etc. Alloy elbow is widely used. Ordinary bronze alloy elbows are
more common in ordinary water pipes, but with the improvement of
living standards, many water pipes use stainless steel elbows.
Alloy elbows made of manganese steel are usually used for concrete
pipes, mud pipes and other pipes with serious wear and consumption.
This is because manganese steel has good resistance to impact,
extrusion and material wear. Nickel steel alloy elbows are usually
used in pipelines with high concentration of oxidizing acids
(nitric acid, sulfuric acid) and other normal temperature
pipelines. High manganese steel alloy elbows are used in pipelines
with severe fluid flow and high impact force. However, unless the
concentration of hydrochloric acid is very low, the pipeline of
reducing acid (hydrochloric acid, dilute sulfuric acid, etc.) will
be seriously corroded. Martensitic alloy elbow has high high
temperature strength, oxidation resistance and water resistance
below 650 ℃, and has vapor corrosion ability, but poor weldability.
Therefore, it is commonly used in high-temperature steam
transmission pipeline and water gas pipeline.
FAQ
Q. How long can make delivery?
A:For stock products, will make shipments in 5- 7 days after
receiving deposit or receiving L/C; for products need new
production for common materials, usually make shipments in 15-20
days; for products need new production for special and rare
materials, usually need 30-40 days to make shipment.
Q:Can you provide the samples?
A:Samples can be provided with samples charge and courier fee by
the buyer's side.
Q:Are the products in stock?
A:Yes.Most of our products are in stock.So we can prompt delivery.
Q:Can you accept customize?
A:Yes.It can be customized as per the customers' request.
Q:What about the quality?
A:According to the standard for production.And we can also accept
the third-party