Rotary Table Lines & Matching Parts for ZJ40 Truck-mounted Drilling Rig

1

Rotary table lines

Z08070000001AA

High-pressure seamless steel pipe, anti-corrosion epoxy coating, inner wall polished, tensile strength ≥ 830MPa, compliant with API Spec 7K and ISO 4394-1

1. Coating damage and corrosion caused by contact with drilling fluid; 2. Fatigue cracking from long-term high-frequency vibration during drilling; 3. Pipe wall damage from over-bending during installation.

1. Ensure installation bending radius ≥ 8 times the pipe diameter; 2. Clean the surface promptly after contact with drilling fluid and reapply anti-corrosion paint if needed; 3. Avoid collision with drilling tools during operation.

1

Support, brake air relay valve

P7100047AA

Low-carbon steel Q235B, surface powder coating, thickness 10mm, load-bearing capacity compliant with GB/T 700-2006

1. Deformation from uneven stress during installation; 2. Coating wear and corrosion from dust and drilling fluid; 3. Loosening of fixed fasteners due to long-term vibration.

1. Ensure the installation surface is flat and fasteners are evenly tightened; 2. Clean the surface regularly to remove dust and debris; 3. Re-tighten fasteners monthly during continuous operation.

2

Support

P7100217AA

Low-carbon steel Q235B, surface hot-dip galvanizing, thickness 12mm, enhanced corrosion resistance for humid environments

1. Welding joint fatigue and cracking from high vibration; 2. Galvanizing layer damage and rust; 3. Impact deformation from falling drilling debris.

1. Regularly inspect welding joints for cracks; 2. Avoid scratching the galvanizing layer during maintenance; 3. Install protective baffles to prevent debris impact.

3

Support, relay valve

P7200046AA

Low-carbon steel Q235B, surface powder coating, precision machining, designed to match relay valve installation dimensions

1. Stress concentration and deformation from improper relay valve installation; 2. Corrosion from long-term exposure to outdoor humidity; 3. Wear at the contact point with the relay valve.

1. Align the relay valve correctly during installation to avoid uneven stress; 2. Apply anti-corrosion sealant at the contact point; 3. Check for deformation during weekly maintenance.

1

Hose assembly 10

Z08330300011AA

Inner layer: NBR (nitrile rubber), reinforcement layer: 6-layer high-strength steel wire, outer layer: wear-resistant CR (chloroprene rubber), rated pressure 25MPa, compliant with ISO 18752

1. Steel wire layer damage from over-bending (less than minimum radius); 2. Outer layer wear from friction with rotary table components; 3. High-pressure pulse fatigue leading to bursting.

1. Ensure installation bending radius ≥ 80mm (10mm hose); 2. Install protective sleeves at friction points; 3. Conduct quarterly pressure tests (22MPa, 30 minutes) to check for hidden damage.

2

Hose assembly 10

Z08330300012AA

Inner layer: NBR (nitrile rubber), reinforcement layer: 6-layer high-strength steel wire, outer layer: wear-resistant CR (chloroprene rubber), rated pressure 25MPa, compliant with ISO 18752

1. Joint leakage from seal ring aging; 2. Rubber swelling from incompatible hydraulic oil; 3. Corrosion of steel wire layer from inner layer damage.

1. Replace joint seal rings every 6 months; 2. Use hydraulic oil meeting ISO VG 46 standards; 3. Check for oil seepage regularly to detect inner layer damage early.

3

Hose assembly 6

Z08330100023AA

Inner layer: NBR (nitrile rubber), reinforcement layer: 4-layer high-strength steel wire, outer layer: wear-resistant CR (chloroprene rubber), rated pressure 15MPa, compliant with ISO 6803

1. Damage from improper installation and stretching; 2. Outer layer cracking from extreme temperature changes (-30℃ to 80℃); 3. Foreign object impact leading to bulging.

1. Reserve sufficient length during installation to avoid stretching; 2. Avoid direct exposure to extreme temperatures; 3. Keep the work area clean to prevent foreign object impact.

4

Hose assembly 10I-800

1101003018

Inner layer: NBR (nitrile rubber), reinforcement layer: 6-layer high-strength steel wire, outer layer: wear-resistant CR (chloroprene rubber), length 800mm, rated pressure 25MPa, compliant with ISO 18752

1. Fatigue damage from long-term repeated bending during rotary table operation; 2. Outer layer wear from dragging on the ground; 3. Joint damage from vibration.

1. Minimize unnecessary bending during operation; 2. Avoid dragging the hose on the ground; 3. Install vibration-damping gaskets at joints to reduce wear.

1

Sealing washer 27

4323100003

NBR (nitrile rubber), shore hardness 70±5, oil-resistant and high-temperature resistant (≤120℃), compliant with GB/T 5720-2008

1. Aging and hardening from long-term immersion in hydraulic oil; 2. Damage from uneven compression during installation; 3. Cracking from high temperature near the rotary table.

1. Replace annually or when hardening is found; 2. Ensure even compression with standard torque; 3. Avoid installation near high-temperature rotary table components.

2

1"-14UNS-1"-14UNS bushing

P1100090AA

Stainless steel 304, passivated surface, thread compliant with UNS (Unified National Special) standards, precision machining

1. Thread wear from improper installation and disassembly; 2. Corrosion in humid, dusty environments; 3. Deformation from excessive force during tightening.

1. Use a suitable wrench for installation/disassembly, avoid brute force; 2. Apply anti-corrosion sealant to threads; 3. Do not exceed the recommended tightening torque.

3

M20X2-Z1/2" fitting

QBJ5012004

Carbon steel AISI 1045, zinc plating, thread pitch 2.0mm, compliant with ISO 965-1 and ISO 261

1. Thread sliding from over-tightening; 2. Zinc layer damage and corrosion; 3. Seal surface damage from dirt during installation.

1. Use a torque wrench to tighten to 15-18 N·m; 2. Avoid scratching the zinc layer; 3. Clean the seal surface thoroughly before installation.

4

M14X1.5-Z1/8" fitting

QBJ6051401

Carbon steel AISI 1045, zinc plating, thread pitch 1.5mm, compliant with ISO 965-1

1. Stress concentration at the thread root from vibration; 2. Corrosion of the zinc layer from drilling fluid; 3. Wear from frequent disassembly.

1. Install vibration-damping gaskets; 2. Clean the fitting after contact with drilling fluid; 3. Minimize frequent disassembly.

5

Z1/2"X3/8" bushing

QBJ10010403

Stainless steel 316, passivated surface, thread compliant with ISO 262, designed for size conversion between pipelines

1. Thread wear from size mismatch during installation; 2. Corrosion in chemical drilling fluid environments; 3. Damage from improper tool use.

1. Ensure correct size matching before installation; 2. Avoid contact with chemical drilling fluid; 3. Use professional tools for installation/disassembly.

6

M18X1.5-Z3/8" fitting

QBJ5071803

Carbon steel AISI 1045, zinc plating, thread pitch 1.5mm, compliant with ISO 965-1

1. Seal failure from dirt on the seal surface; 2. Thread wear from over-tightening; 3. Corrosion from outdoor humidity.

1. Clean the seal surface before installation; 2. Tighten to standard torque (12-15 N·m); 3. Apply anti-rust oil monthly in humid environments.

7

M18X1.5-Z3/8" fitting

QBJ6051803

Carbon steel AISI 1045, zinc plating, thread pitch 1.5mm, compliant with ISO 965-1

1. Cracking at the thread root from high vibration; 2. Zinc layer peeling from impact; 3. Wear from long-term use.

1. Install reinforcement brackets near high-vibration areas; 2. Avoid impact on the fitting; 3. Replace if thread wear or cracking is found.

1

M8 nut

4309300008

Carbon steel 45#, zinc plating, thread compliant with ISO 262, hardness HRC 28-32

1. Thread wear from frequent disassembly; 2. Corrosion leading to thread jamming; 3. Deformation from over-tightening.

1. Avoid violent disassembly and assembly; 2. Store in a dry environment when not in use; 3. Replace if thread sliding occurs.

2

Bolt M8X20

4300308020

Alloy steel 8.8 grade, zinc plating, tensile strength ≥ 830MPa, compliant with ISO 898-1

1. Fatigue fracture from long-term high vibration; 2. Thread wear from over-tightening; 3. Corrosion of the zinc layer leading to rust and difficulty in disassembly.

1. Use matching nuts and washers; 2. Tighten to standard torque (8-12 N·m); 3. Regularly clean and apply anti-rust oil.

3

Washer M8

4313100008

65Mn spring steel, surface galvanized, hardness HRC 42-48, compliant with GB/T 93-1987

1. Fatigue loss of elasticity from long-term compression; 2. Corrosion causing fracture; 3. Deformation from incorrect installation.

1. Replace together with bolts and nuts during maintenance; 2. Do not reuse deformed washers; 3. Ensure correct installation direction.

Can the 10mm and 6mm hose assemblies in the rotary table system be used interchangeably?

No, they cannot. The 10mm hose (e.g., Z08330300011AA) is for high-pressure main pipeline transmission (25MPa) with 6-layer steel wire reinforcement; the 6mm hose (Z08330100023AA) is for low-pressure branch transmission (15MPa) with 4-layer reinforcement. Their pressure-bearing capacity, inner diameter, and matching fittings differ—interchange use will cause bursting or leakage.

How often should the rotary table lines (Z08070000001AA) and hose assemblies be replaced under normal working conditions?

Under normal conditions (proper maintenance, no severe impact/corrosion), the rotary table lines have a 2-3 year service life, and hose assemblies have a 3-4 year service life. Inspect every 6 months; replace immediately if there is coating damage, pipe deformation, hose bulging, or cracking—regardless of service life.

What should I do if the fittings and bushings of the rotary table system are corroded?

For slight corrosion: Polish the rusted area with fine sandpaper, clean and dry it, then apply anti-rust oil. For severe corrosion (thread wear, plating peeling, cracking): Replace the component immediately—corroded parts affect leak-proof performance and can cause system failure. Conduct monthly anti-corrosion maintenance in humid/dusty environments.