Technical Resources
Engineering calculators, pipe charts, flange dimensions, thread references, and contractor support tools for plumbing, PVF, steam, and industrial applications.
Use our calculators, dimensional charts, and product guides to size systems, compare standards, and request material fast.
Quick Access
Jump directly to the tools and references you need.
Pipe Sizing Calculator
Size pipe for water, steam, natural gas, and oil using proper engineering inputs.
Open Calculator
Pressure Drop Calculator
Estimate pressure loss through pipe runs using Darcy-Weisbach and Hazen-Williams.
Open Calculator
Valve Cv Calculator
Calculate valve flow coefficient (Cv) for liquid and gas service selection.
Open Calculator
Flow Rate Calculator
Convert between GPM, velocity, and pipe diameter for any fluid system.
Open Calculator
Pump Horsepower Calculator
Estimate water horsepower and brake horsepower for pump selection.
Open Calculator
Section 1
Engineering Calculators
Contractor-ready tools built on verified engineering formulas. All inputs and outputs are labeled with units and assumptions.
Live Tool
Pipe Sizing Calculator
Calculates minimum nominal pipe size based on flow rate and target velocity. Separate inputs for water, steam, natural gas, and oil. Uses standard fluid mechanics relationships — not simplified rules of thumb.
Live Tool
Pressure Drop Calculator
Estimates friction pressure loss through straight pipe runs using the Hazen-Williams equation for water. Input pipe size, length, flow rate, and C-factor. Useful for pump sizing and system troubleshooting.
Live Tool
Valve Cv Calculator
Calculate required flow coefficient (Cv) for valve selection. Cv represents the GPM of water that passes through a valve with 1 PSI pressure drop. Supports liquid and gas service using ISA-75 standard relationships.
Live Tool
Flow Rate Calculator
Convert between GPM, pipe velocity, and inside diameter. Solve for any one variable given the other two. Based on Q = A × V (continuity equation). Useful for verifying sizing and comparing schedules.
Live Tool
Pump Horsepower Calculator
Calculate water horsepower (WHP) and brake horsepower (BHP) for pump selection. Uses standard hydraulic power formula: WHP = (GPM × TDH × SG) ÷ 3960. BHP accounts for pump efficiency.
Section 2
Charts & Dimensional Tables
Quick technical references for dimensions, schedules, and standards. All tables use verified ANSI/ASME source data.
Complete ANSI/ASME B36.10M and B36.19M pipe dimensions. OD is fixed per nominal size — only wall thickness varies by schedule. Orange = STD · Red = XH
| MM | Nom. | O.D. | Data | S/5 | S/10S | S/10 | S/20 | S/30 | STD/S40S | S/40 | S/60 | XH/S80S | S/80 | S/100 | S/120 | S/140 | S/160 | XXH |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Expand to load chart… | ||||||||||||||||||
ANSI/ASME B16.5 raised-face flange dimensions. All dimensions in inches.
| Nom. Size | 150# Class | 300# Class | ||||||
|---|---|---|---|---|---|---|---|---|
| Flange OD | Bolt Circle | # Bolts | Bolt Dia. | Flange OD | Bolt Circle | # Bolts | Bolt Dia. | |
| ½" | 3.50 | 2.38 | 4 | ½" | 3.75 | 2.62 | 4 | 5/8" |
| ¾" | 3.88 | 2.75 | 4 | ½" | 4.62 | 3.25 | 4 | 5/8" |
| 1" | 4.25 | 3.12 | 4 | ½" | 4.88 | 3.50 | 4 | 5/8" |
| 1½" | 5.00 | 3.88 | 4 | ½" | 6.12 | 4.50 | 4 | ¾" |
| 2" | 6.00 | 4.75 | 4 | 5/8" | 6.50 | 5.00 | 8 | 5/8" |
| 2½" | 7.00 | 5.50 | 4 | 5/8" | 7.50 | 5.88 | 8 | ¾" |
| 3" | 7.50 | 6.00 | 4 | 5/8" | 8.25 | 6.62 | 8 | ¾" |
| 4" | 9.00 | 7.50 | 8 | 5/8" | 10.00 | 7.88 | 8 | ¾" |
| 6" | 11.00 | 9.50 | 8 | ¾" | 12.50 | 10.62 | 12 | ¾" |
| 8" | 13.50 | 11.75 | 8 | ¾" | 15.00 | 13.00 | 12 | 7/8" |
| 10" | 16.00 | 14.25 | 12 | 7/8" | 17.50 | 15.25 | 16 | 1" |
| 12" | 19.00 | 17.00 | 12 | 7/8" | 20.50 | 17.75 | 16 | 1⅛" |
National Pipe Taper (NPT) thread specifications per ANSI B1.20.1. All dimensions in inches.
| Nom. Size | TPI | OD at Thread | Pitch Dia. | Length of Engagement | Notes |
|---|---|---|---|---|---|
| 1/8" | 27 | 0.405" | 0.37360" | 0.160" | — |
| 1/4" | 18 | 0.540" | 0.49163" | 0.2611" | — |
| 3/8" | 18 | 0.675" | 0.62701" | 0.2639" | — |
| 1/2" | 14 | 0.840" | 0.77843" | 0.3457" | Most common residential size |
| 3/4" | 14 | 1.050" | 0.98887" | 0.3589" | — |
| 1" | 11½ | 1.315" | 1.23863" | 0.4018" | — |
| 1¼" | 11½ | 1.660" | 1.58338" | 0.4078" | — |
| 1½" | 11½ | 1.900" | 1.82234" | 0.4078" | — |
| 2" | 11½ | 2.375" | 2.29627" | 0.4356" | — |
| 2½" | 8 | 2.875" | 2.76216" | 0.6828" | — |
| 3" | 8 | 3.500" | 3.38850" | 0.7656" | — |
| 4" | 8 | 4.500" | 4.38712" | 0.8438" | — |
| 6" | 8 | 6.625" | 6.50950" | 0.9531" | — |
| 8" | 8 | 8.625" | 8.50969" | 1.0625" | — |
Copper tube dimensions per ASTM B88. Nominal size ≠ OD — copper OD is always 1/8" larger than nominal. Type K = thickest wall. Type M = thinnest wall. All dimensions in inches.
| Nom. Size | OD | Type K | Type L | Type M | |||
|---|---|---|---|---|---|---|---|
| Wall | ID | Wall | ID | Wall | ID | ||
| 3/8" | 0.500" | 0.049" | 0.402" | 0.035" | 0.430" | 0.025" | 0.450" |
| 1/2" | 0.625" | 0.049" | 0.527" | 0.040" | 0.545" | 0.028" | 0.569" |
| 3/4" | 0.875" | 0.065" | 0.745" | 0.045" | 0.785" | 0.032" | 0.811" |
| 1" | 1.125" | 0.065" | 0.995" | 0.050" | 1.025" | 0.035" | 1.055" |
| 1¼" | 1.375" | 0.065" | 1.245" | 0.055" | 1.265" | 0.042" | 1.291" |
| 1½" | 1.625" | 0.072" | 1.481" | 0.060" | 1.505" | 0.049" | 1.527" |
| 2" | 2.125" | 0.083" | 1.959" | 0.060" | 2.005" | 0.058" | 2.009" |
| 3" | 3.125" | 0.109" | 2.907" | 0.090" | 2.945" | 0.072" | 2.981" |
| 4" | 4.125" | 0.134" | 3.857" | 0.110" | 3.905" | 0.083" | 3.959" |
Section 3
Selection Guides
Written for working contractors and maintenance buyers. No fluff — just the right product for the right application.
Thread Sealant Guide
Match the right tape or pipe dope to your fluid, pressure, and temperature. Wrong sealant = leaks and code violations.
| Application | Fluid | Correct Product | Notes |
|---|---|---|---|
| Gas lines | Natural gas, LP | Yellow PTFE or gas-rated dope | White tape NOT approved for gas |
| Potable water | Cold & hot water | White PTFE or NSF-61 dope | Must be NSF/ANSI 61 certified |
| Steam | Steam ≤ 250°F | High-temp pipe dope | PTFE not recommended above 212°F |
| Hydraulic | Oil, hydraulic fluid | Anaerobic sealant | PTFE can shred & contaminate |
| Air | Compressed air | White PTFE tape | 2–3 wraps, clockwise |
Valve Selection Guide
Different valves are built for different jobs. Using the wrong valve type causes poor flow control and premature failure.
| Valve Type | Best For | Typical Use |
|---|---|---|
| Ball Valve | On/Off isolation | General plumbing, gas, water service |
| Gate Valve | Full open/close, infrequent | Main shutoffs, older systems |
| Globe Valve | Throttling/flow regulation | Steam, boiler feed, flow control |
| Check Valve | Backflow prevention | Pumps, water heaters, boosters |
| Butterfly Valve | Large diameter | HVAC, fire suppression, mains |
Section 4
Technical Documents
Manufacturer spec sheets, product documentation, and support materials. Filter by category.
📄 Technical documents and manufacturer spec sheets will be listed here.
Need a spec sheet? Contact us and we'll get it for you.
FAQ
Frequently Asked Questions
Common questions from plumbing contractors, MRO buyers, and industrial maintenance teams.
Size based on flow rate and target velocity — typically 2–8 ft/sec for water. Higher velocity causes erosion and pressure loss. Use our Pipe Sizing Calculator for an engineered recommendation.
Steam is compressible — its volume changes with pressure and temperature. Sizing accounts for pressure drop per 100 ft of run and steam velocity (typically 50–150 ft/sec). Condensate return lines require completely separate sizing. Never apply water rules to steam systems.
The rating is a pressure class, not a direct PSI number. A 150# carbon steel flange handles ~285 PSI at 100°F; 300# handles ~740 PSI. They are NOT interchangeable — OD and bolt holes differ. See the Flange Dimensions table.
Schedule 40 (STD) covers most residential and light commercial water and gas applications. Schedule 80 (XH) is used for higher pressure, industrial, or chemical service. See our Pipe Dimension Chart to compare wall thickness across all schedules.
Yes. Submit your list via our Quote Request page or call (615) 219-9103. We respond same business day and can work from a material takeoff, PO, or part number list.
Gas lines require yellow PTFE tape or gas-rated dope — white tape is not code approved for gas. Potable water needs NSF-61 certified products. Steam requires high-temp dope (not PTFE above 212°F). See the full Thread Sealant Guide.
Cv is the flow coefficient — the GPM of water that passes through a fully open valve with exactly 1 PSI pressure drop. Use our Valve Cv Calculator to determine the minimum required Cv, then select a valve with a rated Cv at or above that value.
Yes. PVFPro ships plumbing and PVF products to contractors and buyers across the US from Murfreesboro, TN. Most in-stock orders ship within 1–2 business days.
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PVF Specialists
Pipe, Valves, Fittings & Sealants
Compliance & Standards
Service Metal Products — Certificate of Conformance
All products sold by Service Metal Products (SMP) are certified and supplied in accordance with nationally recognized specifications and standards. Manufacturing facilities are ISO Certified unless otherwise noted.
Carbon Steel
Weld Fittings
- Seamless — ASTM A/SA234 WPB
- Welded — ASTM A/SA234 WPBW
- Dimensions — ASME B16.9, B16.25
- Carbon max .25%
- ISO Certified
Carbon Steel
Flanges
- Forged — ASTM A/SA105
- Dims thru 24" — ASME B16.5
- Over 24" — ASME B16-47 Series A/B
- Class 600+ — A105N Normalized
- Serrations — MSS-SP-6
- ISO Certified
Forged Carbon Steel
Fittings & Outlets
- Material — ASME SA105N Normalized
- Dims — ASME B16.11
- NPT — ASME B1.20.1
- SW Inserts — MSS-SP-79
- Unions — MSS-SP-83
- Outlets — MSS-SP-97
- ISO Certified
Malleable Iron
Threaded Fittings 150 & 300
- Castings — ASTM A197
- Galvanized — ASTM A153
- Dims — ASME B16.3
- Bushings/Plugs — ASME B16.14
- Unions — ASME B16.39
- NPT — ASME B1.20.1
- Class 150 — UL Listed, FM @ 300 PSI
- Class 300 — UL Listed
- Galv — ANSI/NSF 61-4, CA AB1953
- Origin: Thailand & China
Steel
Nipples
- Welded Sch 40/80: ASTM A53 pipe, ASTM A733
- Galv — ANSI/NSF 61-4, CA AB1953
- Seamless Sch 80/160/XXH: ASTM A106 Gr.B, ASTM A733
- NPT — ASME B1.20.1
- Imported — heat numbers included
- ISO Certified
Steel
Merchant & API Couplings
- Merchant Couplings — ASTM A865
- Threads — ASME B1.20.1
- 1/8"–2" NPSC; 2-1/2"+ NPT
- Bushings & Plugs — ASME B16.14
- API Couplings — ASTM A865
Cast Iron
Flanges & Flanged Fittings
- Grey Iron — ASTM A126 & A48
- Flanges — ASME B16.1
- Fittings — ASME B16.1, AWWA C110
- Galvanized — ASTM A153
- Class 125 — UL Listed thru 12"
- ISO Certified
Ductile Iron
Flanged Fittings 150 & 300
- Castings — ASTM A395
- Dims — AWWA C110/21.10, ASME B16.42
- ISO Certified
SMP Valves
Ball Valves — Brass, CS & SS
- Brass: MSS-SP-110, ASME B16.34
- CS & SS Thrd/SW: MSS-SP-110, ASME B16.11
- CS & SS Flanged: API 607, ASME B16.34, ISO 5211
- All threads — ASME B1.20.1
SMP Valves
Cast Iron Gate, Globe & Check
- Gate — MSS SP-70
- Globe — MSS SP-85
- Check — MSS SP-71
- Flanges — ASME B16.1
- Tested — API 598
- F-to-F — ASME B16.10
SMP Valves
Cast Steel Gate, Globe & Check
- Gate — API 600
- Globe — API 623
- Check — API 594
- F-to-F — ASME B16.10
- Flanges — ASME B16.5
- Tested — API 598
- NACE MR0175
SMP Valves
Forged Steel Gate, Globe & Check
- Design — API 602, ASME B16.34
- SW — ASME B16.11
- Threaded — ASME B1.20.1
- Tested — API 598
- NACE MR-0175
SMP Valves
DI Wafer & Lug Butterfly
- Design — API 609 Class A
- Mounting — ISO 5311
- Ends — ASME B16.1, B16.5
- Tested — API 598
Stainless Steel
Forged Fittings & Outlets
- 304 — ASME A182 F304/F304L
- 316 — ASME A182 F316/F316L
- Dims — ASME B16.11
- NPT — ASME B1.20.1
- SW Inserts — MSS-SP-79
- Unions — MSS-SP-83
- Outlets — MSS-SP-97
- ISO Certified
Stainless Steel
Threaded Fittings 304 & 316
- Corrosion Resistance — ASTM A262
- Material — ASTM A351
- NSF/ANSI 372-2016 Compliant
- REACH & RoHS Certified
- NPT — ASME B1.20.1
- ISO 9001 Certified
Stainless Steel
Nipples 304/L & 316/L
- Dual certified 304/304L or 316/316L
- Material — ASTM A312
- Finished — ASTM A733
- NSF/ANSI 372-2016 Compliant
- REACH & RoHS Certified
- NPT — ASME B1.20.1
- ISO 9001 Certified
Source: Service Metal Products Certificate of Conformance — October 2024. Contact sales@pvfpro.com for current certification documentation.