1500mm forge joint double wall casing used for liebherr-lb28 rig for cased bored pile 

1500mm forge joint double wall casings Diameter 1500/140 mm, wall thickness 50mm for cased bored pile match liebherr-LB28 rotary drill rig

casing oscillator use double wall casing OD1500/ID1400MM match liebherr-lb28 rig for cased bored pile 

1500mm double wall casing 25CrMO forge joint used on liebherr-lb24 rig for cased bored pile foundation work 

OD1500/1400MM double wall casing with bauer-screw joint used on liebherr-lb36 rig for bored pile foundation work 

1500mm heavy duty double wall casing used with casing rotator for drilled shaft secant pile foundation work 

A 1500mm outer diameter (OD) double-wall casing with forged joints is a highly compatible setup for a Liebherr-LB 28 rotary drilling rig, matching its maximum cased drilling diameter threshold for standard Kelly drilling configurations.

Here is the technical breakdown of the casing specifications, coupling mechanics, and rig compatibility:

1. Casing Dimensions & Tool Clearance

For a standard 1500mm double-wall casing, the dimensions typically fall into one of two profiles depending on whether you are running  (CA-DW series) or premium aftermarket casing lines:

Specification

Profile A 

Profile B (Heavy-Duty Aftermarket)

Outer Diameter (OD)

1500 mm

1500 mm

Inner Diameter (ID)

1420 mm

1400 mm

Total Wall Thickness

40 mm

50 mm

Wall Configuration

18mm outer / 10mm inner + ribs

20mm outer / 10mm inner + ribs

Max Tool Diameter

1390 mm (Auger / Bucket)

1350 mm (Auger / Bucket)

Standard Lengths

1.0m, 2.0m, 3.0m, 4.0m, 5.0m, 6.0m

1.0m, 2.0m, 3.0m, 4.0m

2. Forged Joint & Coupling Mechanics

High-torque rigs like the LB 28 require premium forged joints (male/female rings machined from high-strength forged steel like 25CrMo4 or 42CrMo4) to withstand both the torsional forces of the rotary drive and the high crowd/pull forces.

Connection Type: Typically features a conical sleeve/bolt connection system (Bauer or Liebherr standard compatibility).

Locking Hardware: Utilizes a 12-bolt configuration per joint layout around the circumference. The joint is secured using conical bolts, matching threaded rings, and locating keys to prevent loose tolerances during oscillation or rotation. 

Torque Transfer: Forged joints ensure even stress distribution across the casing string, minimizing the risk of wall deformation when the LB 28 applies maximum crowd pressure or when paired with a casing oscillator.

3. Liebherr-LB 28 Rig Compatibility

The LB 28 is well-suited to handle this specific casing size due to its structural and hydraulic capacities:

Torque Capacity: Equipped with the BA 280 rotary drive, the LB 28 delivers up to 280–297 kNm of torque, providing ample power to cut and rotate a 1500mm casing string through dense or cohesive soils.

Crowd Force: The rig's rope crowd system provides up to 400 kN of push/pull force, ensuring effective installation and casing extraction.

Drive Adaptability: The casing string connects directly to the rotary table using a 1500mm Casing Driver Adapter (Twister) attached to the BA 280 cardanic joint. It can also be seamlessly integrated if your project requires an external casing oscillator

tianjin huachang xingye technology co ltd Double wall сasing: diameter 600-2000mm with walls thickness 40-50mm.Length 1m,2m,3m,4m,5m,6m Designed for drilling with drived by casing oscillator or a rig rotary system. Connections   conical thread screws and centring keys.double wall casing pipe/Single wall casingOur double wall casing have two type joint , one is forge joint:materials is 25CrMO,another type is roll jointCasing joints and pipes for pile protection of collapsing. Casing joints are composed of one male half joint and one female joint welded at each end of casing pipe for easy pipe connection. Joints coupling supplied with conical screw type for single and double wall casing.cardan joint for rotary drilling

D1/D2

1m

2m

3m

4m

5m

6m

a1

a2

t2

Bolts

(mm)

Weight(kg) Parts Number

(mm)

(mm)

(mm)

(Nos)

620/540

403

739

1074

1411

1747

2081

12

8

40

8

750/670

492

902

1311

1722

2131

2540

12

8

40

10

880/800

585

1069

1552

2036

2520

3005

12

8

40

10

1000/920

669

1221

1773

2328

2877

3429

12

8

40

10

1180/1100

844

1580

2316

3052

3787

4522

16

8

40

12

1200/1120

872

1620

2370

3120

3870

4620

16

8

40

12

1300/1220

933

1746

2558

3372

4184

4996

16

8

40

12

1500/1400

1433

2628

3817

5009

6210

7393

20

10

50

12

1800/1700

1730

3166

4602

6038

7474

8910

20

10

50

16

2000/1880

2450

4280

6110

7940

9770

11600

20

15

60

12

2200/2080

2700

4720

6740

8760

10780

12800

20

15

60

12

2500/2380

2960

5240

7520

9800

12080

14360

20

15

60

16

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