Our 310S pipe caps comply with ASTM A403 specifications for wrought austenitic stainless steel fittings, incorporating chemical compositions of 24-26% chromium, 19-22% nickel, and trace elements like manganese and silicon.
This grade outperforms 304 or 316 in thermal applications due to its reduced sensitization risk during welding. Manufacturing involves hot forming, solution annealing at 1900-2050°F, and quenching to optimize corrosion resistance and mechanical properties, with tensile strength ≥75 ksi and yield strength ≥30 ksi.
310S Stainless Steel Pipe Caps Overview
310S stainless steel is an austenitic chromium-nickel alloy with low carbon content (typically ≤0.08%), designed for superior oxidation resistance and high-temperature performance. It maintains structural stability up to 2000°F (1093°C) in continuous service and offers excellent resistance to sulfidation and carburization.
Pipe caps, also known as end caps, are butt-weld fittings used to seal the ends of pipes, preventing fluid leakage and protecting against contamination. Under ASME B16.9, these fittings are specified for factory-made wrought butt-welding applications, ensuring seamless integration with piping systems.
ASME B16.9 310S Pipe Cap Dimensions
As a dedicated supplier, we maintain an extensive inventory of 310S Pipe Caps compliant with global standards, including ASME B16.9, ASME B16.28, and MSS-SP-43. Our product is to meet diverse project requirements.
Standard Dimensional Range (ASME B16.9):
Size Range: From ½" NB (Nominal Bore) to 48" NB, covering both seamless and welded construction types.
Wall Thickness: Available in all standard schedules, including SCH 5S, 10S, 20, STD, 40, 80S, XS, 160, and XXS, among others.
Types: Standard Pipe Cap (Dish Cap), with options for special shapes upon request.
The table below outlines dimensions for a selection of standard sizes:
|
Nominal Pipe Size (NPS) |
Outside Diameter (O.D.) D (mm) |
Overall Length E (mm) |
Limiting Wall Thickness (mm) |
|
1/2" |
21.34 |
25.40 |
3.37 |
|
1" |
33.40 |
38.10 |
4.55 |
|
2" |
60.33 |
38.10 |
5.54 |
|
4" |
114.30 |
63.50 |
8.56 |
|
8" |
219.08 |
101.60 |
12.70 |
|
12" |
323.85 |
152.40 |
12.70 |
|
24" |
609.60 |
266.70 |
12.70 |
310S Stainless Steel Pipe Caps Price
Pricing for 310S pipe caps varies based on size, schedule, quantity, and market conditions. As of December 2025, market data indicates per-kilogram costs for 310S stainless steel ranging from USD 3.0 to 4.0, translating to fitting prices influenced by weight and fabrication.
Our competitive pricing reflects bulk manufacturing efficiencies, with FOB quotes for standard items. The following table provides indicative price ranges per unit (USD), drawn from supplier benchmarks like those from Priminox and SUS 310S data, assuming SCH 40 unless specified.
|
Nominal Pipe Size (NPS) |
Seamless Cap Price Range (USD) |
Welded Cap Price Range (USD) |
Approximate Weight (lbs) |
|
1/2" |
5 - 10 |
4 - 8 |
0.18 |
|
3/4" |
6 - 12 |
5 - 10 |
0.25 |
|
1" |
8 - 15 |
7 - 13 |
0.40 |
|
1-1/2" |
12 - 20 |
10 - 18 |
0.75 |
|
2" |
15 - 25 |
13 - 22 |
1.00 |
|
3" |
25 - 40 |
22 - 35 |
2.00 |
|
4" |
35 - 55 |
30 - 50 |
3.50 |
|
6" |
60 - 90 |
50 - 80 |
8.00 |
|
8" |
100 - 150 |
90 - 130 |
15.00 |
|
10" |
150 - 220 |
130 - 200 |
25.00 |
|
12" |
200 - 300 |
180 - 270 |
35.00 |
|
14" - 24" |
300 - 600+ |
250 - 500+ |
50 - 150+ |
Factors Influencing 310S Stainless Steel Pipe Cap Prices
Primarily, raw material costs constitute 50-70% of the total price, with nickel and chromium prices volatile due to global supply chains. As of late 2025, nickel spot prices hover around USD 15,000-18,000 per ton, directly impacting 310S, which contains 19-22% nickel.
Larger NPS and thicker schedules increase material usage and machining complexity, elevating costs by 20-50%. Manufacturing processes affects pricing; seamless caps command a 10-20% premium for superior strength in high-pressure applications.
Additionally, quality certifications and testing requirements increase costs by 5-10%, ensuring compliance but justifying the premium for critical applications.
Applications and Benefits
310S pipe caps excel in high-heat scenarios, such as furnace components, heat exchangers, and kiln linings, where oxidation resistance prevents scaling. In chemical processing, they withstand acids and alkalis, extending service life. Compared to 304, 310S offers 2-3 times better creep strength at 1000°F (538°C), reducing maintenance costs.
Our Company's Advantages
We maintain a robust inventory with traceability from mill to delivery, offering value-added services like custom beveling and expedited shipping. Our pricing strategy emphasizes transparency, with no hidden fees.
In summary, 310S stainless steel pipe caps under ASME B16.9 provide reliable solutions for demanding environments. Contact us for quotes to optimize your procurement.
