GOST FLANGES
Welding Neck Flange is flanges that designed to be joined to a piping system by butt welding. This kind of flange include lots of specification.
WN flange is generally made by forging or forging process. When the steel plate or section steel manufacturing, meet the following requirements: 1, butt welding flange should be ultrasonic inspection, no layered defects; 2. Should be cut into strips along the direction of steel rolling, welded into a ring through bending, and the surface of the steel to form a cylinder of the ring. Steel plate shall not be machined directly into neck butt welding flange; 3. The butt weld of the ring should adopt full penetration weld; 4. The butt weld of the ring shall be subjected to post-welding heat treatment, and X-ray or ultrasonic inspection shall be carried out, and X-ray inspection shall meet the II requirements of JB4730, and ultrasonic inspection shall meet the I requirements of JB473
| 1. Standard: | GOST 12820- 80 GOST 12821- 80 | |
| 2. Type: | Plate flange, Threaded, Irrigation,Blind, Lap Joint flange. Type | |
| 3. Pressure Class: | PN6;PN10; PN16; PN25; PN40; | |
| 4. Dimension: | DN10-2000 | |
| 5. Surface Treament: | Anti-rust oil; Yellow paint; Black paint;Hot dip Galavnised; Zinc. | |
| 6. Raw Material: | RST 37.2; P245GH ; S235JR | |
| 7. Packing | Wooden Case, Pallet. | |
| 8. Payment: | L/C, T/T, Western Union, PayPal | |
| 9. Delivery time: | 30 ~60 days after confirm the order | |
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| 1. Standard: | GOST 12820- 80 GOST 12821- 80 | |
| 2. Type: | Plate flange, Threaded, Irrigation,Blind, Lap Joint flange. Type | |
| 3. Pressure Class: | PN6;PN10; PN16; PN25; PN40; | |
| 4. Dimension: | DN10-2000 | |
| 5. Surface Treament: | Anti-rust oil; Yellow paint; Black paint;Hot dip Galavnised; Zinc. | |
| 6. Raw Material: | RST 37.2; P245GH ; S235JR | |
| 7. Packing | Wooden Case, Pallet. | |
| 8. Payment: | L/C, T/T, Western Union, PayPal | |
| 9. Delivery time: | 30 ~60 days after confirm the order | |
| 1. Standard: | GOST 12820- 80 GOST 12821- 80 | |
| 2. Type: | Plate flange, Threaded, Irrigation,Blind, Lap Joint flange. Type | |
| 3. Pressure Class: | PN6;PN10; PN16; PN25; PN40; | |
| 4. Dimension: | DN10-2000 | |
| 5. Surface Treament: | Anti-rust oil; Yellow paint; Black paint;Hot dip Galavnised; Zinc. | |
| 6. Raw Material: | RST 37.2; P245GH ; S235JR | |
| 7. Packing | Wooden Case, Pallet. | |
| 8. Payment: | L/C, T/T, Western Union, PayPal | |
| 9. Delivery time: | 30 ~60 days after confirm the order | |
