Komprenante PPR Pipe Specifaĵon

mi. Introduction of PPR water pipe

PPR (hazarda kopolimerigita polipropileno) pipo is a new type of environmentally friendly plastic pipe, kun ĝia alta temperaturrezisto, koroda rezisto, longa vivo (pli ol 50 jaroj) and other characteristics, widely used in construction of hot and cold water systems, HVAC engineering and industrial fluid transportation field. Its core advantages include:

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.

Konvena instalado: 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-colo pipo), 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. Premo-taksado (PN value)

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

PN value	Applicable scenes	Maximum working temperature
PN10	Malvarma akvosistemo (≤20°C)	60°C (mallongatempa)
PN16	Conventional hot and cold water system	70°C (long-term)
PN20	High temperature heating system	80°C (long-term)
PN25	Industrial high pressure systems	95°C (short term)

3. SDR (Norma Dimensia Proporcio)

SDR (Norma Dimensia Proporcio) 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) / murdikeco (en)

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

The larger the SDR value → the thinner the pipe wall → better economy, suitable for low-pressure scenarios.

Common SDR values and corresponding pressure ratings

SDR	Nominal Pressure (PN)	Applicable Scenarios
6	PN25	Industrial high pressure, high temperature steam
7.4	PN20	Centralized heating, high temperature water circulation
9	PN16	Conventional hot and cold water systems
11	PN10	Low-pressure cold water transportation

3. How to select according to SDR?

1. Selection according to system pressure demand

High-pressure scenario (e.g. HVAC boiler room): choose SDR6 or SDR7.4 with large wall thickness and strong creep resistance.

Conventional residential hot and cold water: SDR9 (PN16) can meet more than 90% of the demand.

Low-cost cold water project: SDR11 (PN10) has the best economy.

2. Matching by temperature adaptability

High temperature system (≥70°C): low SDR value (e.g. SDR7.4) must be selected to avoid deformation due to thermal expansion.

Low temperature chilled water system: High SDR value (e.g. 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 minutoj) post instalado.

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) produktoj. Kiel profesia fabrikanto, we offer a full range of SDR-specification PPR pipes and customized solutions to help customers build safe and durable piping systems.

Provizanto

Luoyang Datang Energy Tech Co., Ltd. estas profesia fabrikisto kaj provizanto de pipoj kaj armaturo. Ni ofertas PPR-tubojn, PVC-tuboj, PE-tuboj, kaj planka hejtado tuboj kaj garnituro por ĉiuj specoj de tuboj, kun alta kvalito kaj konkurencivaj prezoj. Se vi havas demandojn pri tuboj kaj ekipaĵoj, bonvolu ne hezitu kontakti nin. Vi povas alklaki la produkton por kontakti nin.