Kelly Hose Quality Control System Jingbo Hose

At Hebei Jingbo Petroleum Machinery Co., Ltd. , quality is not just a final inspection—it is an integrated philosophy that spans every stage of production. With over three decades of manufacturing experience and API certification, our Quality Control System ensures that every Kelly Hose leaving our facility meets the highest international standards for safety, durability, and performance.

In-Process Quality Control (IPQC)

Our IPQC system involves continuous monitoring and inspection throughout the manufacturing process. This proactive approach identifies and addresses any deviations before they become defects, ensuring consistent product quality.

1. Outer Diameter Checking During Production

Continuous Monitoring: The outer diameter is measured at multiple stages using precision calipers and laser measurement tools.
Tolerance Verification: Ensures the hose dimensions remain within API 7K specified tolerances, guaranteeing compatibility with end connections and couplings.
Layer-by-Layer Inspection: Diameter checks are performed after each construction layer (inner tube, reinforcement, outer cover) to maintain uniformity.

2. Length Measurement

Pre-Cut Verification: Raw hose lengths are measured before cutting to ensure optimal material utilization.
Post-Assembly Measurement: After coupling attachment, final lengths are verified against customer specifications.
Growth/Contraction Check: Following pressure testing, the hose is re-measured to ensure no permanent dimensional change exceeds allowable limits.

3. Pressure Testing

Hydrostatic Testing: Every assembled Kelly Hose undergoes rigorous hydrostatic pressure testing to validate:
Hose body integrity
Coupling retention strength
Leak-proof performance
Test Documentation: Pressure graphs and test certificates are generated and maintained for full traceability.
Safety Factor Verification: Tests confirm the hose meets or exceeds API 7K burst pressure requirements.

4. Connection Checking

Crimp Dimension Verification: Each coupling attachment is measured to ensure precise crimp diameter and concentricity.
Thread Gauge Inspection: All hammer union threads, flanges, and connections are inspected using API-certified thread gauges.
Visual and Dimensional Inspection: Connections are examined for surface defects, proper alignment, and secure attachment.

5. API Standard Compliance

API Spec 7K: All quality control procedures adhere strictly to API Specification 7K for drilling equipment.
API Monogram Program: As an API-licensed facility (License #7K-0376), we maintain the rigorous quality management systems required to bear the API monogram.

Specialized Certification: Fire Performance Testing

SwRI Certificate – Choke and Kill Hose Fire Performance (704°C)

For our Choke and Kill Hose products, we have obtained specialized certification from Southwest Research Institute (SwRI) , a globally respected independent research and development organization.

Test Standard: API 16C / API 7K fire performance requirements
Test Condition: 704°C (1300°F) flame exposure
Certification Validation: Confirms the hose maintains pressure containment and functionality during and after fire exposure, critical for offshore and high-risk drilling environments.

This certification demonstrates our commitment to providing safety-critical products for the most demanding applications.

Our Services: Supporting Your Operations Worldwide

Beyond manufacturing excellence, we provide comprehensive support services to ensure your complete satisfaction.

24/7 Online Service

Instant Communication: Our sales and technical support teams are available around the clock via email, messaging apps, and phone.
Quick Response: Inquiries are typically answered within 2-4 hours, regardless of time zone differences.
Technical Consultation: Immediate access to engineering expertise for product selection and application support.

OEM Production

Custom Manufacturing: We produce hoses to your exact specifications, including:

Custom lengths
Special end connections
Specific material compounds
Unique packaging requirements

Branding Options: Private labeling and custom marking available.
Engineering Collaboration: Our team works with your engineers to develop optimized solutions.

12-Month Warranty

Comprehensive Coverage: All products are warranted against defects in materials and workmanship for 12 months from the date of shipment.
Replacement Policy: Defective products are replaced promptly upon verification.
Peace of Mind: Our warranty reflects our confidence in the quality and durability of our products.

Installation Documentation

Technical Manuals: Detailed installation instructions, torque specifications, and handling guidelines.
Assembly Drawings: CAD drawings and connection diagrams for reference.
Maintenance Guidelines: Recommendations for inspection intervals and storage procedures.
Traceability Records: Complete documentation package including test certificates, material certifications, and API traceability.