Shanxi Kaisheng Plastic Co., Ltd. is one of the most reliable manufacturers and suppliers of pp compression fittings in China. Please feel free to buy CE approved pp compression fittings in stock here from our factory. All customized products are with high quality and competitive price. Contact us for quotation.
Product Overview
Pp Compression Fittings designed for mechanical connection of PE pipes in water supply, irrigation and related low-to-medium pressure piping applications. Available in multiple configurations, sizes and threaded connection options for project and distribution requirements.
Specifications & Fitting Types
|
Technical Parameter |
Specification Detail |
|
Material Composition |
Body & Nut: 100% Virgin PP-B; Split Ring: POM; O-Ring: NBR |
|
Working Pressure |
PN16 for sizes 20mm to 63mm; PN10 for sizes 75mm to 110mm (at 20°C) |
|
Thread Standards |
BSP / NPT Parallel and Tapered threads available for male/female adapters |
|
Compatibility |
Designed for HDPE, LDPE, and metric PE80 / PE100 pipes |
Engineering Performance Boundaries
Designed with a 3.2 safety factor, PN16 fittings withstand a minimum burst pressure of 5.0 MPa at 20°C, protecting against severe pressure surges and water hammer.
Enhanced with carbon black and HALS, the PP-B body passes >1,000 hours of QUV accelerated weathering tests (ISO 4892-2), ensuring a 50+ year design life in outdoor applications.
The NBR O-ring maintains a secure, leak-free seal across dynamic thermal expansion cycles from -10°C to +40°C continuous operation.
Designed for Faster PE Pipe Connection
Tool-Free Initial Assembly: Designed for manual pre-tightening, allowing installation teams to assemble connections rapidly without heavy wrenches or specialized electrical equipment.
Zero Pipe Preparation Required: Pipes do not require specialized scraping or peeling of the outer surface before insertion, reducing preparatory labor on site.
Slip-Resistant Grip Distribution: The internal split ring design maintains a balanced mechanical grip around the PE pipe circumference, preventing displacement caused by soil shifting or water hammer.
Reusability in Maintenance: The mechanical structure permits disassembly and reassembly during network maintenance without damaging the pipe or fitting body.
Construction & Connection Design
Body (Polypropylene): UV-stabilized exterior body designed to resist environmental stress cracking and outdoor weathering.
Nut (Polypropylene): Features exterior ribs for high-friction manual gripping during tightening.
Split Ring / Locking Ring (Polyacetal / POM): Secures the pipe axially, preventing pull-out under high internal system pressure.
Thrust Ring: Distributes the compression force evenly across the sealing elements during nut rotation.
O-Ring (NBR Rubber): Creates a positive hydraulic seal against the pipe outer wall, maintaining water tightness across low and high-pressure cycles.
Product Series Available
Couplings: Straight Couplings, Reducing Couplings, Female/Male Threaded Couplings
Elbows: 90° Elbows, Wall-Plate Elbows, Female/Male Threaded Elbows
Tees: Equal Tees, Reducing Tees, Female/Male Threaded Tees
End Caps & Flange Adaptors: For terminal closures and flanged valve connections
Manufacturing & Quality Control
Raw Material Sourcing: We utilize virgin PP-B compound granules exclusively, ensuring high impact resistance and long-term resistance to ultraviolet degradation.
Precision Injection Molding: Automated injection lines maintain strict cycle-time and temperature controls to guarantee uniform wall thickness and zero internal voids.
Dimensional Verification: Random coordinate and go/no-go gauge checks are performed during production runs to ensure thread tolerances and inner diameters align with ISO standards.
Hydrostatic Pressure Testing: Finished batches undergo rigorous pressure testing on specialized benches, verifying structural integrity at 1.5 times working pressure prior to dispatch.
Frequently Asked Questions
Q: What packaging methods do you use for bulk international shipments?
A: We utilize standard export-grade packaging. Each fitting is individually bagged to prevent thread friction during transit, packed in reinforced corrugated master cartons, and secured on pallets to minimize ocean freight damage.
Q: What kind of technical assistance is provided for first-time buyers?
A: We provide comprehensive installation manuals with every shipment. For complex project installations, our technical support team is available via remote video consultation to assist your engineering staff.
Q: Can these fittings be buried directly underground or installed inside concrete trenches?
A: Yes. The virgin PP-B material and UV-stabilized body resist soil corrosion, making them suitable for direct burial. However, ensure proper pipe bedding to avoid localized ground shear stress.
Q: What is the Minimum Order Quantity (MOQ) and production lead time?
A: Standard MOQ is typically 1,000 pieces per size/type (negotiable for trial orders). Regular production lead time is 15–25 days depending on the order volume.
Q: Do you support OEM/ODM services and custom branding?
A: Yes. We support custom logos on fitting bodies and customized master carton packaging for bulk B2B orders.
Q: What quality management and international certifications do your products hold?
A: Our manufacturing processes are strictly certified under ISO9001 quality management standards, and our product lines comply with CE requirements for international export.
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