Premium Plain Sleeves and Steel Pipe Nipples China Factory Suppliers

Leading China factory and suppliers of premium steel couplings and pipe nipples. Size 1/4-6 inch, length 10cm-180cm, BSPT and NPT threads. High-performance industrial connectivity with fast 10-30 days delivery.


Our premium Plain Sleeves and Steel Pipe Nipples are engineered for high-performance industrial connectivity, ensuring leak-proof joints and maximum structural integrity. Manufactured from high-grade carbon steel, alloy steel, and stainless steel, these components are designed to withstand rigorous working conditions across water, oil, and gas transmission systems.

With a commitment to precision and durability, our products adhere to international standards including BS21, DIN2999, and ASTM A865-9. Whether you require heavy-duty specifications for high-pressure environments or standard series for general applications, our versatile range of couplings and nipples provides the reliability your infrastructure demands.

Detailed Parameters

Available MaterialsCarbon Steel, Alloy Steel, Stainless Steel Thread StandardsBS21, DIN2999, ASTM A865-9
Working PressureMax 1.5MPa (Test Pressure: Max 2.5MPa) Temperature Range-20°C to 120°C
Surface TreatmentGalvanized, Electro-galvanized, Normal Black/Shining Black Size Range (OD)1/8" to 8"
Wall Thickness0.5mm - 10mm (SCH20 to SCH160, STD, XS, XXS) Available LengthsLess than 12m or customized requirements
Series OptionsHeavy, Standard, Medium, and Light Series CertificationISO9001:2000, BV

Key Advantages

Superior Durability

Utilizing premium alloys and carbon steel to ensure long-term resistance against wear and corrosion in harsh environments.

Global Compliance

Fully compliant with ASTM, DIN, and BS standards, ensuring seamless integration into international projects.

Precision Engineering

Strict tolerance control for wall thickness (SCH20-SCH160) to prevent leaks and maximize safety.

Versatile Applications

Optimized for the transport of water, oil, and gas, making it ideal for petrochemical and utility sectors.

Customizable Design

Support for customer drawings and customized branding for bulk orders (min 10 tons per spec).

Certified Quality

ISO9001:2000 and BV certified production processes ensure consistent quality across every batch.

Product Gallery

Management Platforms

Logistics Management

Flexible packaging options including cartons with/without pallets and double woven bags to suit shipping needs.

Production Capacity

Powered by 300 workers and 20 senior engineers, delivering 150-200 containers annually.

Lead Time Control

Efficient delivery cycles typically ranging from 30 to 45 days after deposit receipt.

Global Market Reach

Exporting to USA, Russia, Mexico, Canada, UAE, and throughout the European region.

QC Assurance

Comprehensive testing for working pressure (1.5MPa) and test pressure (2.5MPa) for every lot.

After-Sales Support

Industry-leading guarantee: Full payment refund if product defects are found within six months.

Investment Return Comparison

Performance MetricStandard FittingsOur Premium Fittings
Lifespan3-5 Years10+ Years
Leakage RateModerateNear Zero
Corrosion ResistanceStandardEnhanced (Galvanized)
Installation CostLowOptimized (Fast Fit)
Maintenance FrequencyHighVery Low

Frequently Asked Questions

Q: What materials are available for your Plain Sleeves and Nipples?

We offer a wide selection of materials including Carbon Steel, Alloy Steel, and Stainless Steel to ensure compatibility with various industrial chemical and pressure requirements.

Q: Which international thread standards do your products follow?

Our products are manufactured according to British Standard (BS21), DIN standard (DIN2999), and American Standard (ASTM A865-9) threads for global interoperability.

Q: Can you customize the brand and design for bulk orders?

Yes, we provide custom branding and design based on customer drawings. Minimum order quantity for custom branding is 10 tons per specification.

Q: What is the maximum working pressure for these pipe fittings?

The maximum working pressure is 1.5MPa, and we conduct rigorous testing up to 2.5MPa to ensure the safety and reliability of every component.

Q: What are the available surface treatments to prevent corrosion?

We provide Galvanized, Electro-galvanized, and Normal Black/Shining Black finishes depending on the environmental exposure of your installation.

Q: What is your warranty policy for quality defects?

We provide a comprehensive quality guarantee: if any product quality defects are found within half a year of purchase, the full payment will be refunded.

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