GH4169 welded pipe material composition

GH4169 welded pipe material composition

GH4169 welded pipe, also known as GH4169 welded steel pipe, is a steel pipe made by welding steel plates or steel strips made of GH4169 material after curling and forming. The reason why GH4169 welded pipe is inferior to seamless pipe of the same material is that its production process is relatively simple. Let's take a look at the entire welding process together:
① The GH4169 steel plate or strip required for raw material uncoiling and leveling production of welded pipes exists in the form of coils, so the * step is to perform uncoiling and leveling.
② End cutting and welding are performed on both sides of GH4169 steel plate using a milling machine to achieve the required plate width, plate edge parallelism, and groove shape
③ Forming on the JCO forming machine, first, half of the pre bent GH4169 steel plate is subjected to multiple step stamping to press it into a 'J' shape, and then the other half of the steel plate is similarly bent and pressed into a 'C' shape to form an open 'O' shape.
⑤ Welding is carried out using longitudinal multi wire submerged arc welding on both sides of the GH4169 formed steel pipe, and continuous welding is performed using gas shielded welding (MAG).
⑥ Remove the welding beads formed by GH4169 welding by removing the inner and outer welding beads.
⑦ Preliminary pre correction work was carried out on GH4169 as a whole.
⑧ Induction heat treatment is a surface heat treatment process that uses induced current to locally heat a workpiece.
⑨ According to the order, the GH4169 pipes that have undergone induction heat treatment will be scaled and straightened to achieve the required straightness.
⑩ Eddy current testing can detect defects such as cracks, inclusions, and pits in GH4169.
Cut GH4169 to size according to the order.
12. Water pressure inspection: The GH4169 pipes that have been cut off are inspected one by one on the water pressure testing machine to ensure that the welded pipes meet the standard test pressure requirements. The machine has automatic recording and storage functions.
Acid washing uses acid solution to remove oxide scale and rust on the surface of GH4169 steel pipe.
After final inspection, packaging, and shipment, GH4169 steel pipes that pass the inspection will be anti-corrosion and coated according to user requirements before packaging and waiting for shipment.
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GH4169 welded pipe material composition：

Brand 2: GH4169
C(％): ≤0.03
Cr(％): 17.0～21.0
Mo(％): 2.80～3.30
Ni(％): 50.0～55.0
W(％):
Al(％): 0.20～0.60
Nb(％): 4.75～5.50
Ti(％): 0.65～1.15
Fe(％): ba1
Si(％)≤: 0.35
Mn(％)≤: 0.35
P(％): 0.015
S(％): 0.015
Other (%): B ≤ 0.006

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Classification and Processing Materials of GH4169 Welded Pipe:
Shanghai Longji welded pipes are divided into GH4169 arc welded pipes according to the process, and the required materials are 1 * 1220 * 2440 steel plates
Shanghai Longji welded pipes are divided into GH4169 high-frequency resistance welded pipes according to the process, and the required materials are 2 * 1220 * 2440 thin plates
Shanghai Longji welded pipes are divided into GH4169 gas welded pipes according to the process, and the required materials are 3 * 1220 * 2440 flat plates
Shanghai Longji welded pipes are divided into GH4169 furnace welded pipes according to the process, and the required materials are 4 * 1220 * 2440 coils
Shanghai Longji welded pipes are divided into GH4169 low-frequency resistance welded pipes according to the process, and the required materials are 5 * 1220 * 2440 steel strips
Shanghai Longji welded pipe is divided into GH4169 straight seam welded pipe according to the weld seam, and the required materials are 6 * 1220 * 2440 coils
Shanghai Longji welded pipe is divided into GH4169 spiral welded pipe according to the weld seam, and the required material is 7 * 1220 * 2440 precision strip
Shanghai Longji welded pipe is divided into GH4169 circular steel pipes according to section, and the required materials are 13 * 1220 * 2440 coils
Shanghai Longji welded pipe is divided into GH4169 square steel pipes according to section, and the required materials are 14 * 1220 * 2440 steel strips
Shanghai Longji welded pipe is divided into GH4169 elliptical steel pipes according to section, and the required material is 15 * 1220 * 2440 thin strip
Shanghai Longji welded pipe is divided into GH4169 triangular steel pipes according to section, and the required materials are 16 * 1220 * 2440 steel plates
Shanghai Longji welded pipe is divided into GH4169 hexagonal steel pipes according to section, and the required materials are 17 * 1220 * 2440 flat plates
Shanghai Longji welded pipe is divided into GH4169 diamond shaped steel pipes according to section, and the required material is 18 * 1220 * 2440 precision strip
Shanghai Longji welded pipe is divided into GH4169 octagonal steel pipes according to section, and the required materials are 19 * 1220 * 2440 narrow strips
Shanghai Longji welded pipe is divided into GH4169 semi-circular steel pipes according to section, and the required materials are 20 * 1220 * 2440 flat plates
Shanghai Longji welded pipe is divided into GH4169 double convex steel pipes according to section, and the required materials are 21 * 1220 * 2440 plates
Shanghai Longji welded pipe is divided into GH4169 double concave steel pipes according to section, and the required material is 6 * 1220 * 2440 steel strip
Shanghai Longji welded pipe is divided into GH4169 melon seed shaped steel pipes according to section, and the required materials are 8 * 1220 * 2440 flat plates
Shanghai Longji welded pipe is divided into GH4169 conical steel pipes according to section, and the required materials are 4 * 1220 * 2440 thin plates
Shanghai Longji welded pipe is divided into GH4169 corrugated steel pipes according to section, and the required materials are 10 * 1220 * 2440 flat plates
Shanghai Longji welded pipe is divided into GH4169 circular welded pipe according to the end shape, and the required material is 8 * 1220 * 2440 narrow strip
Shanghai Longji welded pipe is divided into GH4169 special-shaped square tubes according to the end shape, and the required materials are 9 * 1220 * 2440 plates
Shanghai Longji welded pipe is divided into GH4169 special-shaped flat pipes according to the end shape, and the required materials are 10 * 1220 * 2440 flat plates