# Pipe Sizer - Pipe Sizing Chart — Hazen-Williams for HVAC & MEP

> Hazen-Williams for HVAC & MEP (iPhone/iPad app by ezyHVAC Co., Ltd..)

- Source: https://appshunter.io/ios/app/pipe-sizer-pipe-sizing-chart/id6825391227 (this page in markdown: same URL + `.md`)
- Developer: [ezyHVAC Co., Ltd.](https://appshunter.io/developer/6825391229)
- Category: Utilities, Reference
- Price: $2.99
- Age rating: 4+
- Requires: iOS 16.4 · 29 MB
- Languages: American English
- Released: 2026-10-25
- Data updated: 2026-11-01

## What is Pipe Sizer?

Pipe Sizer is an interactive log-log pipe sizing chart based on the Hazen-Williams equation, made for engineers and technicians who size water piping: plumbing, condenser water and chilled water systems.

Tap the chart to read values instantly
• Flow, friction loss and velocity on the nearest pipe size
• Shows whether the point is inside the design zone (too slow, too fast, or over the friction limit)
• Double-tap to fix a flow rate, then slide one finger to compare pipe sizes at that flow
• Pinch with two fingers to zoom and pan

Pipe catalogues
• PVC to Thai standard TIS 17-2532 (classes 5, 8.5, 13.5) and PVC Sch40/80 (ASTM D1785)
• PPR, HDPE (PN4–PN25), steel Sch40/60/80, GSP (BS 1387), CPVC and PB
• Inside diameters are calculated from each standard's wall thickness

Fits your project
• Open system (C = 100) and closed system (C = 140), or enter your own C factor
• ASHRAE STYLE and CARRIER STYLE (Carrier open-piping chart values for steel pipe)
• Flow in gpm, L/min or m³/h; friction loss in m/100m, ft/100ft, Pa/m or kPa/m
• Adjustable design zone: minimum and maximum velocity, small-pipe limit and maximum friction loss
• Dark mode, automatic or by choice
• Thai, English and more than 30 other languages

Compressed air and steam (new in 1.4.0)
• Compressed air: sizing chart by working pressure, separate main-header and branch limits; steel, galvanized, copper and PPR; L/s, m³/min, m³/h, CFM
• Saturated steam: sizing chart by pressure, with saturation temperature and the heat carried; kg/h, lb/h, t/h
• Darcy-Weisbach with the Colebrook friction factor, per ASHRAE Fundamentals

Pipe insulation (new in 1.4.0)
• Chilled water: anti-condensation thickness from water and air temperatures and humidity (ASHRAE dew point)
• Steam: thickness that keeps the outer surface below a set limit, with the heat loss
• Check an existing thickness · 7 insulation materials · jacket choice

Works offline. No sign-up, no ads, no personal data collected.

Developed by EZYHVAC Co., Ltd. in collaboration with University of Phayao.
Note: results are estimates for preliminary design. Always check against the applicable standards and the pipe manufacturer's data.

## Is Pipe Sizer safe?

Not enough ratings yet to assess Pipe Sizer.

## Is Pipe Sizer legit?

Pipe Sizer - Pipe Sizing Chart has limited verification signals. The AppsHunter Legitimacy Score for Pipe Sizer is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 2 releases)

### 1.4.0 — 2026-10-30

Version 1.4.0 adds
• Compressed air: pipe sizing chart by working pressure, with separate main-header and branch zones; steel, galvanized, copper and PPR pipes
• Saturated steam: pipe sizing chart by pressure, with the heat carried
• Pipe insulation: anti-condensation thickness for chilled-water pipes, and a steam-pipe check against a surface-temperature limit; check an existing thickness too
• Dark mode, automatic or by choice
• Formulas based on ASHRAE Fundamentals, the same data and equations as Pipe Sizer Desktop

### 1.0.0 — 2026-10-25

No release notes.

## Related topics

[gas pipe sizing plumb](https://appshunter.io/ios/topics/gas-pipe-sizing-plumb)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-11-01.*