# P Numbers

> Productivity

Canonical page: [https://chrome-stats.com/d/id911716649](https://chrome-stats.com/d/id911716649)

## Overview

- **ID:** `id911716649`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** C-spec
- **Category:** Productivity
- **Rating:** 4.80 / 5 (5 ratings)
- **Version:** 2.1
- **Last updated:** 2024-09-10
- **First published:** 2014-09-04
- **Size:** 13 MB
- **Data as of:** 2026-09-22
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/p-numbers/id911716649)
- **Privacy policy:** [http://weldofficeweb.com/#/privacy](http://weldofficeweb.com/#/privacy)

## Description

P-Numbers includes base metals listed in the latest 2023 edition of ASME Section IX Table QW/QB-422

P-Numbers: Quick lookup of base metal weldability grouping numbers for welding procedure and performance qualification. Data is provided by C-spec from the master source used for generation, proof-reading and maintenance of ASME Section IX Table QW/QB-422, AWS B2.1 Table C1 and C2, and ISO/TR 20173.

## Rankings

- #446,459 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/id911716649)