より極端な環境では, どの配管継手が「生き残る」ことができるか?答えは一つしかない:PP-RCT

PP-RCT is a high-performance upgraded material in the field of polypropylene piping, full name Polypropylene Random Copolymer with enhanced Crystallinity Temperature, commonly referred to as high-temperature-resistant polypropylene pipe or fourth-generation PP-R pipe. It is not a completely new material, but a high-performance polypropylene pipe developed on the basis of traditional PP-R through molecular structure optimization, crystallization morphology control, and nanomodification technologies.

The core differences between PP-RCT and traditional PP-R

On the left is the monoclinic crystal (α crystal) of PP-R, and on the right is the hexagonal crystal (β crystal) of PP-RCT.

Performance Indicators	Traditional PP-R	PP-RCT
Long-term service temperature	≤70℃	≤90~95℃
Short-term tolerance temperature	≤95℃	≤110℃
Minimum required strength (MRS)	8.0 MPa	10.0 MPa
High-temperature pressure-bearing capacity	Benchmark	Increase by 30%~50%
Low temperature impact resistance	General (brittle below 0℃)	Significantly improved (still flexible at -20°C)
Wall thickness under the same pressure	Relatively thick	Can be thinned by 15%~20%
Creep/Stress Cracking Resistance	中くらい	素晴らしい

Manufacturing of PP-RCT

Special Resin Synthesis and Modification
Random copolymerization of propylene with 1.5%~4% ethylene, precisely controlling the molecular weight distribution; the core involves a blend of high-efficiency α-crystalline nucleating agents and a composite anti-oxidation system. Through twin-screw blending and granulation, special particles with high crystallinity and high melt strength are formed.
Precision Extrusion Molding
Single-screw extrusion is used with strict temperature control (≤230°C to prevent degradation); the key to success lies in ‘gradient slow cooling’ サイズ調整 (60°C → 40°C → 25°C staged spraying), allowing the nucleating agents to fully act and uniformly refine spherulites, avoiding internal stress and microcracks caused by rapid cooling; laser online diameter and thickness measurement is conducted throughout.
Mandatory Quality Inspection and Certification
Must pass a 1000-hour static hydrostatic test at 95°C/10.0MPa and extrapolate life to 70°C/50 years according to ISO 9080; simultaneously test thermal stability (OIT ≥ 20 分) and drinking water hygiene safety; after passing, the pipe body is mandatorily marked with PP-RCT, pressure rating, and the applicable standard.

PP-RCT three-layer co-extrusion production line：内層 (PP-R) → Middle layer (PP-R fiberglass reinforced layer) → Outer layer (PP-R)

The advantages of pp-rct in extreme environments

Extremely cold but not brittle: fine crystalline structure, homogeneous heat fusion, high system integrity under freeze-thaw cycles;
High temperature but not soft: MRS 10.0 MPa, anti-oxidation system, long-term stability at 90°C operating conditions;
Earthquake-resistant and corrosion-resistant: flexible one-piece molding, chemically inert, suitable for geologically active areas and high-chlorine water quality regions.

Application of pp-rct

Building hot and cold water supply systems (especially for high-rise buildings, hot water return, and whole-house water supply for villas)
Connection of underfloor heating main/branch pipes, exposed pipelines for radiators
Solar heat collection systems, air source heat pump refrigerant water systems
Places with high requirements for water quality and temperature, such as hospitals, hotels, swimming pools, そして食品工場
Industrial low-pressure fluid transport (non-strongly corrosive media, temperature ≤ 95°C)

会社概要

洛陽大唐能源科技有限公司., 株式会社. 高品質のプラスチックパイプと継手を専門とする中国の大手メーカーです. 最先端の自動生産ラインを備え、チームによってサポートされています。 200 専門家, 私たちは以上を含む広範な製品ラインを提供しています 150 給水および排水システム用に設計されたプラスチック製のパイプおよび継手の種類, ガストランスミッション, および床暖房システム. 当社の主力製品には塩ビ管および継手などがあります。, PE (HDPE) パイプと継手, PPR パイプおよび継手, およびPEX床暖房パイプ.

HDPE パイプ継手に関するお問い合わせは, お気軽にお問い合わせください!

電話番号:0086-183 3790 0677

微信: 0086-183 3790 0677

ワッツアップ: 0086-183 3790 0677

電子メール: sales@pipesandfittings.net