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Description

Slotted Bridge Water Well Screen Pipes
Technical Parameters of Bridge Water well screen slot pipes:
Screen pipe Sizes
•OD:from 4 in to 80 in
•WT from 3 mm / 0.12 in. to 10mm / 0.4 in.
•lengths up to 6m



The main specification
Nominal diameter (mm) 146 159 219 273 325 377 426 529
ID 130 140 138 200 198 254 250 246 305 300 297 357 350 346 406 400 398 502 500 498
Wall thickness 5 5 6 5 6 5 6 8 5 6 8 5 6 8 5 6 8 6 7 8
Coupling outside diameter 146 160 162 220 226 274 278 278 325 328 329 377 378 379 426 428 432 529 530 531
Selection of slot size
Aquifer classification gravel Rough sand Medium sand Fine sand Mealy sand
Screening results (mm) 1-2.5 0.5-1 0.25-0.5 0.1-0.25 0.1-0.25
Bridge slots (mm) 3 1.5-2 1 1 0.75
Filling gravel spec (mm) 4-20 2-8 2-3 2-3 2-3
Filling gravel thickness (mm) 75-100 100 100-200 100-200 100-200


Mechanical property
Nominal diameter (mm) 159 219 273 325 377 426 529
Wall thickness 5 6 5 6 5 6 8 5 6 8 5 6 8 5 6 8 6 7 8
Tensile strength (KN) 230 270 320 390 400 490 653 480 570 760 560 670 893 630 760 1048 782 944 1296
Critical Collapse Strength (N/cm2) 520 690 340 450 170 230 306 136 203 270 128 183 244 92 135 203 90 136 186
Slot sizes and open area
Wall thickness 5 6 8
slot 0.75 1 1.5 2 2.5 0.75 1 1.5 2 2.5 0.75 1 1.5 2 2.5
Bridge lateral spacing 12.75 15 16
Bridge longitudinal spacing 45.50 52 62
Porosity 15.5% 17% 21% 24% 26.5% 14.5% 15.7% 18.9% 22.2% 25.7% 13.5% 14.5% 17.9% 21.2% 24.1%



Well Screen Bridge Pipe Materials of Construction:
•All types of steel such as carbon steel, galvanized steel, coated steel and stainless steel types 304, 304L, 316, 316L & 430, for example.
Strainer pipe Slot Sizes:
•Between 0.5 mm / 0.002 in. and 5mm / 0.2 in., depending on the wall thickness.
Material 304.316 steel
OD(mm) 146.159.219.273.325.377.426.529
WT(mm) 5-8
Length up to 6 m
Surface treatment painting or galvanzied
End connection plain beveled or flanged or couplings
Advantage of the bridge slot water well screen tubes:
1.high strength well screen
2.long usage time bridge slot screen
3.thin weight
4.low cost screen pipe
5.easier operation to save more time
6.custom made to meet your require better



Application:
This type of bridge slot screen pipe is used in projects of water wells, mining & Mineral Processing, municipal water supply, refining & petrochemical, water treatment, architecture and construction, etc.
Bridge slot screen features bridge-like slot, which creates a gap between the well casing and the packed gravel. Bridge slots are spaced in rows or in staggered state.Straight seam welded bridge slot screen (ERW) is manufactured on a press from flat sheets or plates. The bridge type perforated steel sheets or plates are then rolled into cylinders and the seam welded. As well as, there is another new craft of bridge slotted pipe here, spiral welded bridge slot screen (SSAW). Meanwhile, there are 2 options of the bridge type slot patterns, straight in rows and in staggered. The slots size is precise and can be changed as practical requirements. Bridge slot pipe screens usually use low carbon steel Q235, stainless steel 304, 304L, 316L. To prolong its service life, galvanized well screens are still supplied.
Bridge slot screen tube is used in projects of water well, mining & mineral processing, municipal water supply, refining & petrochemical, water treatment, architecture and construction, etc.



Well Screen Bridge Pipe Materials of Construction:
•All types of steel such as carbon steel, galvanized steel, coated steel and stainless steel types 304, 304L, 316, 316L & 430, for example.

Features of Slotted Bridge Water Well Screen Pipes
Bridge slot has outstanding anti-plugging performance for its unique bridge construction.
Bridge construction also enhances the mechanical strength against twisting, compressive and tensile forces.
Diverse external coatings are available to extend the operational lives of watering wells.
Bridge slot screen is lightweight and quite affordable compared with other conventional well screens.
Slot widths can be customized to satisfy customers’ specific requirements.



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Cangzhou Datang Steel Pipe Co., Ltd All Right Resevered.