P Numbers vs Pipedata
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
P Numbers
Quickly access weldability grouping numbers for welding procedures and performance qualifications. This app provides data from authoritative sources like ASME Section IX and AWS B2.1.
- Base metal weldability grouping lookup
- Welding procedure qualification data
- Performance qualification data
- ASME Section IX Table QW/QB-422 data
- AWS B2.1 Table C1 and C2 data
- ISO/TR 20173 data
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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.
Pipedata
Access comprehensive dimensional and weight data for over 160 piping components, including flanges, valves, and fittings. Features design aids like safe spans and pipe flexibility, with a color-coded interface for clarity. Supports metric and imperial units.
- Piping component dimensions and weights
- Flange, valve, and fitting data
- Design aids (safe spans, flexibility)
- Metric and U.S. Customary Units
- Color-coded component interface
- ASME and DIN standard compliance
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Pipedata-Plus has dimensional and weight information for over 160 common piping components with the addition of specialities such as strainers, weldoflanges etc. Pipedata-Plus also includes design aids, safe spans, pipe flexibility, spacing and more. The interface is enhanced with colour coded components and parameters. Based on the latest ASME piping dimensional specifications it shows Metric, U.S. Customary Units and Inch Fractions, NPS and DN pipe sizes and includes audited valve weights, flange and pipe weights and all piping component weights. DATA SUMMARY Pipedata-Plus Provides Piping Dimensions and Weights Flange Dimensions and Weights Valve Dimensions and Weights Piping Fittings Dimensions and Weights for the following components: FLANGES ASME B16.5 Flanges WeldNeck Flange Slip On Flange Blind Flange Threaded Flange SocketWelded FlangeLapped Flange Long Welding Neck Flange ASME B16.47 Series A Flanges WeldNeck Flange Blind Flange ASME B16.47 Series B Flanges WeldNeck Flange Blind Flange Orifice Flanges ASME B16.36 WeldNeck Slip On Threaded API-6A Flanges API Type 6B Weldneck Threaded Flange Blind API Type 6BX WeldNeck Blind and Test Flange Reducing Flanges AMSE B16.5 Threaded Slip-On ASME Compact Flanges Standard Swivel Blind Hub and Clamp Hub-Clamp Pipe Connector Din Flanges EN1092-1:2013 Blind Flange Threaded Flange Flat Flange Weldneck Flange Lapped Flange BS 10 Flanges TABLES A,D,E,F,H,J,K.R & S PIPE FITTINGS ASME B16.9 Butt Welded Pipe Fittings ASME B16.11 Threaded Pipe Fittings ASME B16.11 Socket Welded Pipe Fittings VALVES ASME B16.10 Flanged Valves Gate Valve Globe Valve Ball Valve Control Valve (for layout) Swing Check Wafer Check Wafer type Butterfly Lug type Butterfly Buttwelded Valves Gate Globe Ball Valve Check Threaded Valves Gate Globe Horizontal Check Vertical Check Socketwelded Valves Gate Globe Horizontal Check Vertical Check BLINDS AND SPACERS ASME B16.48 Spectacle Blind Line Spade and Spacer RTJ Male Type Reversible Spade RTJ Male Type Line Spade WELDED BRANCHES Olets ButtWelded Threaded SocketWelded Weldoflange Elbowflange Latroflange Nipoflange Pipets ButtWelded Threaded SocketWelded Flanged GASKETS None Metallic Flat Ring for ASME B16.5 Flanges None Metallic Flat Ring for ASME B16.47 Series A Flanges None Metallic Flat Ring for ASME B16.47 Series B Flanges Spiral wound for ASME B16.5 Flanges Spiral wound for ASME B16.47 Series A Flanges Spiral wound for ASME B16.47 Series B Flanges RTJ soft iron ring type R - ASME B16.21 RTJ soft iron ring type RX - ASME B16.21 RTJ soft iron ring type BX - ASME B16.21 PIPE ASME B16.10M/19M Pipe By Schedule Pipe By Wall Thickness NUTS ISO Nuts UNC Nuts DESIGN AIDS ASME Composite Dimensions Pipe Flexibility Pipe Leg Pipe Loop Safe spans Safe rack spans Safe Pipe Spacing Safe Pipe Spacing with Insulation Safe Flanged Pipe Spacing Safe Flanged Pipe Spacing With Insulation
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Verdict
The clearest difference is price: P Numbers at Free against Pipedata's $12.99. P Numbers also leads on review sentiment (100% vs 90%). Pipedata's advantage is update cadence (weekly vs every 39 months) and iOS requirement (11.0 vs 13.0). On rating, ratings volume, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
P Numbers is free to download; Pipedata costs $12.99 up front. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 4.8 for P Numbers against 4.7 for Pipedata. Both are backed by a comparable volume of ratings — 5 and 3 respectively. Written reviews are what separate them: 100% of P Numbers's written reviews are positive against 90% of Pipedata's.
P Numbers ships an update every 39 months, Pipedata weekly. The most recent releases landed on June 11, 2026 and September 21, 2026 respectively.
| Parameter | P Numbers | Pipedata |
|---|---|---|
| Price | Free — better | $12.99 |
| Rating | 4.8 (5 ratings) — better | 4.7 (3 ratings) |
| Positive reviews | 100.0% of reviews — better | 90.5% of reviews |
| Number of ratings | 5 — better | 3 |
| Update frequency | Every 39 months | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 13 MB | 40 MB |
| Age rating | 4+ | 4+ |
| Developer | ASMEIX CORPORATION | John Bennett |
Customer experience
P Numbers
Pipedata
In-app purchases
P Numbers
No in-app purchases
Pipedata
No in-app purchases
