Your Reliable Manufacturer of Oil Crossover in China
- Certified by CE, CCC, ISO9001, ISO14001 product Standards
- OEM/ODM Order Available with your design
- 15 years industrial experience with skilled workers
**Oil Casing Cross-Over Sub**
Our casing cross-over subs are precision-engineered to provide reliable connections between casing strings of different diameters or thread types. Manufactured from high-grade alloy steel, they ensure superior strength and pressure integrity in demanding downhole environments.
This critical component facilitates a smooth wellbore transition, preventing flow restrictions and ensuring operational continuity. Easy to install and rigorously tested, our cross-over subs are the trusted solution for achieving a secure and efficient casing program.
Luxin Machinery
Reliable Oil Crossover Manufacturer in China
Tian jin Luxin Machinery Co., Ltd. is located in Tianjin, adjacent to the capital Beijing, east of TianjinPort,convenient transportation, superior geographical location, mainly produces oil casing, tubing, Pup joints, coupling, transfer joints, plug, air tightness special thread connection, as well as seamless steel pipe, pipeline steel pipe, alloy steel pipe and so on.
Our company has long served the major domestic oil casing manufacturers and cooperated with major oil fields for a long time, and our products are sold at home and abroad. We have strong technical force, strict requirements on product quality, advanced internal management system, strict testing means, ensure excellent product performance, strictly control every link of the product, and adopt the API standard control of the American Petroleum Institute from raw material to finished product shipment and after sale. And can accept the authoritative tripartite inspection at any time to check and check, so that all the products are under strict monitoring to ensure that the product quality meets the requirements of customers.
Product Categories
Types of Oil Crossover
Casing Crossover
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J55 Crossover
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J55变径接头
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N80 Cerossover
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变扣
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4 1 2 5 1 2 变径接头
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X Over
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5 1 2 Crossover
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Product Feature - 1
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The coordinates of the factory
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Advantages
Why Choose Us
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Proven Expertise
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Strict Quality
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Complete Range
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Global Standards
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Reliable Supply
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Customer Support
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XXX Production Process
Our fire protection products are manufactured through a precise, quality-controlled process, ensuring durability, reliability, and compliance with international safety standards from raw materials to final packaging.
Raw Materials
We carefully source high-grade metals, seals, and other certified materials, ensuring consistency, strength, and compliance with fire safety standards before entering the production line.
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Specialized machines shape and refine the control button, maintaining accuracy and smooth operation, ensuring reliable activation during emergency fire protection situations.
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The valve cover is precisely molded, machined, and finished, providing strong protection and a secure housing to withstand high-pressure conditions in fire protection systems.
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All critical components are assembled under strict supervision, aligning parts accurately to guarantee functionality, durability, and long-term operational safety of the fire protection product.
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Each unit undergoes rigorous water pressure testing, simulating real-life emergency conditions to verify strength, leakage prevention, and reliable performance under extreme pressure.
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Products are coated with anti-corrosion, heat-resistant spray paint, ensuring long-lasting durability, improved aesthetics, and protection against environmental wear in challenging fire safety environments.
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Final assembly integrates tested and coated components, producing a complete unit that meets strict performance and safety requirements before entering the market.
Packaging & Shipping
Finished products are securely packaged using protective materials, labeled, and prepared for efficient shipping, ensuring safe delivery to customers worldwide without damage.
Quality Inspection
QA - 1
Each hydrant undergoes rigorous hydrostatic testing far exceeding standard operational pressures to guarantee zero leaks and structural integrity under extreme conditions.
QA - 2
We verify raw material grades and critically measure all thread dimensions and flange sizes to ensure perfect compatibility and interchangeability.
QA - 4
A thorough inspection of the coating thickness, adhesion, and uniformity ensures a durable, weather-resistant finish that prevents rust and extends product lifespan.
QA - 4
Every valve mechanism is tested for smooth operation—ensuring easy opening, closing, and full water flow—to guarantee reliable performance in emergency situations.
Certificates
Our fire protection products are certified by internationally recognized standards, ensuring safety, reliability, environmental responsibility, and compliance with strict quality requirements.
CE
CE certification guarantees our products meet European Union safety, health, and environmental protection standards.
ISO9001
ISO9001 certification demonstrates our strict quality management system, ensuring consistent product excellence.
ISO 14001
ISO14001 certification confirms our commitment to environmental responsibility, minimizing impact through sustainable production and eco-friendly practices in manufacturing.
Order Process
Inquiry & Quote
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Confirm Order & Deposit
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Production & QC
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Shipping & Balance Payment
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After-sales Support
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Testimonials
What Our Custoemers Say
FAQ
Most Popular Questions
1. Are you a factory or a trading company?
We are a factory company with our own factory located in Fujian Province. I have 15 years of experience in the fire protection industry
2. Why did we choose you? What advantages do you have?
We have an independent R&D team, a professional production and sales team, strong production capacity, strict product quality control, competitive prices, and comprehensive services. Small orders are also acceptable.
3.What is the payment method?
We accept wire transfers, letters of credit, Western Union, PayPal, and credit cards.
4. Can you customize products according to the customer's design?
Of course, OEM and ODM are acceptable to us, and you can directly mark the customer’s brand on the surface of the product.
5.What is your delivery time?
Delivery will be made within 10-30 days after receiving the deposit. According to the quantity.
6. What is the sample fee?
The sample cost and shipping fee need to be borne by you. When you reach the quantity based on the sample cost and total order amount, we will refund the sample fee and shipping fee.
7. Any inquiries will be replied to within 24 hours?
We can do it through email skype、 Communicate through WeChat, WhatsApp, and phone.
8. How do you ship the products?
And we also work with DHL, TNT，UPS，FedEx，EMS， China Airlines Post has strong cooperative relationships with many freight forwarders. You can also specify your freight forwarder.
9. What Certificates can you supply?
We have the certificates of : CCC, CE, ISO9001, ISO14001.
10. ls there any guarantee?
Contact Us
Let's Get Started
we are happy to hear from you and will reply to your with our product solutions.
Proressional Expert
With 15+ years of experience, our experts deliver reliable, high-performance fire-fighting products solutions for you.
Technology & Innovation
We integrate cutting-edge technology to create innovative, efficient, and environmentally sustainable pump solutions.
7/24 Online Service
Our customer support team is available 24/7 to assist with inquiries, technical questions, and product support.