For engineers, procurement specialists, and B2B buyers, knowing exact pipe dimensions in both metric and imperial units is essential for design, fabrication, and installation. The following table provides detailed dimensions for a 4-inch ASTM A312 TP316L Schedule 10S pipe.
Pipe Overview
Standard: ASTM A312
Material Grade: TP316L Stainless Steel
Nominal Pipe Size (NPS): 4"
Schedule: 10S (thin-wall for low-pressure applications)
Applications: Chemical processing, food and beverage, water treatment, pharmaceutical, marine systems
Dimensions Table – 4" SCH 10S Pipe
| Parameter | Metric (mm) | Imperial (inch) |
|---|---|---|
| Nominal Pipe Size (NPS) | 4 | 4" |
| Outside Diameter (OD) | 114.3 | 4.5" |
| Wall Thickness (t) | 2.77 | 0.109" |
| Inside Diameter (ID) | 108.76 | 4.28" |
| Approx. Weight per Meter | 6.12 kg/m | 4.10 lb/ft |
| Tolerance (Wall Thickness) | ±0.13 | ±0.005" |
Notes:
The OD is standard for all stainless steel pipes of the same nominal size.
ID is calculated as OD minus twice the wall thickness.
Tolerances follow ASTM A312 / ASME B36.19M standards.
Weight per meter is approximate based on stainless steel density ~8 g/cm³.
How to Use These Dimensions
Pipe Fitting & Flange Selection: OD and ID ensure compatibility with flanges, valves, and couplings.
Pressure Rating Calculations: Use wall thickness for MAWP calculations.
Structural Design: Weight per meter is essential for supports, hangers, and lifting calculations.
Procurement & Shipping: Knowing dimensions and weight ensures accurate material orders and cost estimation.
FAQ
1. What is the wall thickness of a 4-inch SCH 10S TP316L pipe?
The wall thickness is 2.77 mm (0.109 inch).
2. What is the outside diameter (OD) of a 4-inch pipe?
The outside diameter is standardized at 114.3 mm (4.5 inch) for all 4" nominal stainless steel pipes.
3. What is the inside diameter (ID) of a 4-inch SCH 10S pipe?
The inside diameter is calculated as:
ID=OD−2×Wall Thickness=114.3−2×2.77=108.76 mm (4.28")ID = OD - 2 \times Wall\ Thickness = 114.3 - 2 \times 2.77 = 108.76\ mm\ (4.28")ID=OD−2×Wall Thickness=114.3−2×2.77=108.76 mm (4.28")
4. What is the approximate weight per meter of this pipe?
The weight per meter is approximately 6.12 kg/m (4.10 lb/ft) based on stainless steel density (~8 g/cm³).
5. What is the tolerance for wall thickness?
For SCH 10S, the tolerance is ±0.13 mm (±0.005 inch) according to ASTM A312 and ASME B36.19M standards.
6. Can SCH 10S TP316L pipes handle high-pressure applications?
SCH 10S is thin-walled, designed for low-pressure applications. For higher pressure, use SCH 40S or SCH 80S.
7. What industries commonly use 4" TP316L SCH 10S pipes?
Chemical processing plants
Food and beverage production
Water treatment systems
Pharmaceutical manufacturing
Marine and offshore applications
8. Can the dimensions be used for flange and fitting selection?
Yes. The OD and ID ensure proper mating with standard flanges, valves, and couplings.
9. Are SCH 10S dimensions the same in metric and imperial units?
Yes. ASTM and ASME standards define both mm and inch equivalents, ensuring global compatibility.
10. How do I calculate the inside diameter if I only know the OD and wall thickness?
Use the formula:
ID=OD−2×tID = OD - 2 \times tID=OD−2×t
Where t is the wall thickness.
11. Does TP316L provide better corrosion resistance than TP304?
Yes. TP316L contains molybdenum, which improves resistance to chloride and chemical corrosion, making it ideal for marine and chemical applications.
12. Can I use 4" SCH 10S pipes for sanitary applications?
Yes. TP316L stainless steel is widely used in food, beverage, and pharmaceutical industries due to its cleanability and corrosion resistance.
13. How do I verify wall thickness in the field?
Use ultrasonic thickness testing or micrometer measurements to ensure compliance with ASTM A312 tolerances.
14. Is SCH 10S heavier than SCH 5S?
Yes. SCH 10S has a thicker wall, so it is slightly heavier per meter than SCH 5S.
15. Can SCH 10S TP316L pipes be welded?
Yes. They are weldable using standard stainless steel welding procedures. Use low-carbon welding rods or filler to avoid corrosion at welds.
16. Can SCH 10S be used in high-temperature applications?
SCH 10S can handle moderate temperatures, but for elevated temperatures or high-pressure steam, thicker schedules (SCH 40S or SCH 80S) are recommended.
17. Are SCH 10S pipes seamless or welded?
ASTM A312 covers both seamless and welded pipes. Seamless pipes generally have slightly higher strength and no weld factor derating.
18. How do I calculate the weight of a pipe section?
Weight=Weight per meter×LengthWeight = Weight\ per\ meter \times LengthWeight=Weight per meter×Length
For 4" SCH 10S TP316L: 6.12 kg/m × pipe length in meters.
19. Does the schedule affect pressure rating?
Yes. Thicker wall schedules (SCH 40S, SCH 80S) allow higher maximum allowable working pressure (MAWP). SCH 10S is low-pressure rated.
20. Where can I find full dimension charts for all schedules?
Full ASTM A312 TP316L pipe charts with SCH 5S, 10S, 40S, 80S, 160S are available in ASME B36.19M or from pipe manufacturers' datasheets.
