#pprc pipe

In the #Pakistani #market, #4B is a recognized local brand for #uPVC (unplasticized Polyvinyl Chloride) piping systems, widely used for plumbing, sewerage, and tubewell applications.

Below are the primary #ASTM #standards and technical specifications typically associated with 4B and similar #high-#quality #local #uPVC #brands:

Core ASTM Standards for uPVC

ASTM D-1785 This is the standard specification for Schedule 40, 80, and 120 uPVC #pipes. It defines dimensions, operating pressures, and pipe stiffness.

ASTM D-2241 Covers uPVC #pressure-#rated #pipe using the **#SDR (Standard Dimension Ratio) system. This is common for #irrigation and #water #supply.

ASTM D-2466 / D-2467 These standards apply to #uPVC #fittings (Schedule 40 and Schedule 80, respectively) to ensure they match the pressure ratings of the pipes.

ASTM D-2665 Specific to #DWV (#Drain, #Waste, and #Vent) applications, commonly used for building sewerage.

Technical Specifications (Local context)

In addition to ASTM, local brands like 4B often comply with British and International standards to cater to diverse project requirements:

| Standard Type | Designation | Common Application

ASTM (US) Sch 40 / Sch 80 | High-pressure plumbing & industrial use |

BS (British) BS 3505 / 3506 | Standard water supply (Class B to E) |

ISO (International) ISO 4422 / 1452 | General water supply and irrigation |

PS (Pakistan) PS 3051 | Local Pakistan Standard quality compliance |

Key Features of 4B uPVC

Corrosion Resistance Immune to electrolytic or galvanic corrosion, making it ideal for underground installations.

#Chemical #Resistance #Highly #resistant to #acids, #bases, and #salts found in #soil and #domestic #waste.

#Flow #Capacity #Features a #smooth #internal bore (low C-factor) which prevents scaling and ensures #high #flow rates over time.

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