Nkag siab txog PPR Yeeb nkab Specification

Kuv. Introduction of PPR water pipe

PPR (Random copolymerized polypropylene) pipe is a new type of environmentally friendly plastic pipe, with its high temperature resistance, corrosion kuj, long life (ntau dua 50 years) and other characteristics, widely used in construction of hot and cold water systems, HVAC engineering and industrial fluid transportation field. Nws cov txiaj ntsig tseem ceeb suav nrog:

Safety and environmental protection: Non-toxic and odorless, in line with drinking water health standards (GB/T 17219).

Strong temperature resistance: Long-term use temperature of 70°C, short-term temperature resistance up to 95°C.

Pressure and corrosion resistance: No electrochemical corrosion problems, suitable for acid and alkali environments.

Yooj yim rau kev nruab: Hot melt connection technology to achieve seamless sealing, to eliminate the risk of leakage.

2, the specifications of PPR water pipe parameters

1. Outside diameter and wall thickness

PPR pipe specifications to the nominal outside diameter (dn), common sizes include:

dn20 (4-minute pipe), dn25 (6-minute pipe), dn32 (1-inch pipe), dn40, dn50, dn63 and so on.

The wall thickness (en) is calculated based on the SDR value and directly affects the pressure capacity (see SDR details below).

2. Qib siab (PN value)

PPR pipes are divided into four classes according to nominal pressure:

3. SDR (Standard Dimension Ratio)

SDR (Standard Dimension Ratio) is the core design parameter of PPR pipe, defined as the ratio of pipe outer diameter (dn) to wall thickness (en):

SDR = outer diameter (dn) / wall thickness (en)

SDR value is smaller → thicker wall → the stronger the pressure-bearing capacity, suitable for high-pressure systems.

Tus nqi SDR siab dua → phab ntsa raj nyias → kev txuag nyiaj zoo dua, haum rau qhov xwm txheej siab qis.

Cov nqi SDR sib xws thiab qhov ntsuas siab uas phim

3. Yuav xaiv li cas raws li SDR?

1. Xaiv raws li qhov xav tau siab ntawm system

Qhov xwm txheej siab siab (piv txwv. Chav cua sov HVAC): xaiv SDR6 lossis SDR7.4 nrog phab ntsa tuab loj thiab tiv thaiv kev nkhaus zoo.

Dej kub thiab dej txias hauv tsev ib txwm: SDR9 (PN16) tuaj yeem ua tau ntau dua 90% ntawm qhov xav tau.

Qhov project dej txias pheej yig: SDR11 (PN10) muaj kev txuag nyiaj zoo tshaj plaws.

2. Sib phim raws li kev hloov kub

Qhov system kub siab (≥70°C): nqi SDR qis (piv txwv. SDR7.4) must be selected to avoid deformation due to thermal expansion.

Low temperature chilled water system: High SDR value (piv txwv. SDR11) can be selected to reduce cost.

3. Reference to industry standards

National standard GB/T 18742: clear PPR pipe SDR series and size tolerance requirements.

ISO 15874: international general standard, applicable to export-oriented projects.

4, PPR water pipe installation precautions

Thermal fusion temperature control: 260 ± 5 ° C for the optimal fusion temperature, to avoid too high leading to carbonization of the material.

Socket depth: need to match the specifications of the pipe fittings (such as dn20 pipe insertion depth of 14mm).

Pressure test: 1.5 times the working pressure holding pressure test (≥ 30 minutes) after installation.

PPR water pipe through the scientific design of the SDR parameter system, to achieve a balance between performance and cost. When selecting the type, you need to integrate the three elements of system pressure, temperature and budget, and prioritize the selection of high-quality raw materials in line with the national standard (such as Scandinavian Chemical RA130E) products. Raws li ib tug kws tsim khoom, we offer a full range of SDR-specification PPR pipes and customized solutions to help customers build safe and durable piping systems.

Tus Neeg Muag Khoom

Luoyang Datang Energy Tech Co., Ltd. yog ib tug kws tsim khoom thiab muab khoom ntawm cov raj thiab fittings. Peb muab PPR raj, PVC yeeb nkab, PE yeeb nkab, and floor heating pipes and fittings for all types of pipes, with high quality and competitive prices. Yog tias koj muaj lus nug txog cov yeeb nkab thiab fittings, thov tsis txhob yig tiv tauj peb. Koj tuaj yeem nyem rau ntawm cov khoom lag luam kom tau txais kev sib cuag nrog peb.