Threaded Round Cap ASTM A815 UNS S44627 Duplex Stainless Steel 3/4” ASME B16.11

Threaded Round Cap ASTM A815 UNS S44627 Duplex Stainless Steel 3/4” ASME B16.11

1. Product Description

This product is a threaded round cap manufactured from UNS S44627 (also known as E-BRITE® 26-1 or XM-27) super-ferritic stainless steel in accordance with ASTM A815 and ASME B16.11 standards . UNS S44627 is a high-purity ferritic stainless steel with a high chromium content (25–27.5%) and very low carbon/nitrogen levels, offering excellent resistance to chloride pitting and stress-corrosion cracking . This 3/4" fitting features a female NPT threaded connection designed to permanently seal the end of a pipe or fitting in small-bore piping systems .

2. Key Product Parameters

3. Application / Usage

This threaded cap is ideal for corrosive environments requiring low-nickel alloys:

• Chemical Processing: Solenoid valves, pressure vessels, coker components, heat exchangers 

• Marine & Seawater Systems: High-chloride environments where chloride SCC is a concern

• Power Generation: Air preheaters, heat recuperators 

• Pharmaceutical & Process: Equipment requiring soft magnetic properties 

4. Advantages

• Excellent Chloride Resistance: High chromium (25-27.5%) and molybdenum (0.75-1.5%) provide exceptional resistance to pitting and chloride stress-corrosion cracking 

• Threaded Convenience: NPT connection eliminates welding; fast installation and easy removal

• Cost-Effective: Very low nickel content (≤0.50%) provides significant material cost savings compared to austenitic grades 

• Good Fabricability: High purity alloy with tight chemistry control ensures optimum corrosion resistance and ductility 

5. Functions

The threaded round cap provides a permanent, pressure-rated seal for the end of a pipe, fitting, or valve . It is used to close off unused branch connections, provide access points for system inspection, or serve as a test port. The round (hexagonal) design allows for easy wrench tightening and removal, facilitating system maintenance and modification.

6. Installation Instructions

1. Preparation: Clean pipe threads and cap threads thoroughly; remove all dirt, oil, and debris

2. Thread Sealant: Apply PTFE tape or pipe dope to male threads to ensure a reliable seal

3. Thread Engagement: Screw the cap onto the threaded pipe end by hand, then tighten with a wrench to appropriate torque

4. Avoid Over-tightening: Do not exceed recommended torque to prevent cracking the fitting body or damaging threads

7. Precautions

• Thread Compatibility: NPT and BSP threads are not interchangeable. Verify thread type per system specification 

• Temperature Limitation: Maximum corrosion service temperature is approximately 470°C; maximum mechanical service temperature is ~1100°C 

• Ferritic Structure: UNS S44627 is a ferritic stainless steel; avoid exposure to temperatures above 470°C in corrosive service to prevent embrittlement 

• Crevice Corrosion: In potable water applications, use adequate geometry to avoid crevices

8. Shipping & Delivery

• Standard delivery time is typically 15–30 days, subject to order quantity and specification availability.

9. Payment Terms

• Common international payment methods include T/T (Telegraphic Transfer) and L/C at sight (Letter of Credit) .

10. Packaging

• Products are securely packed in plywood cases or wooden crates with internal cushioning to ensure safe transportation and prevent damage during transit .

11. After-Sales / Return & Warranty Policy

• All products undergo strict quality inspection before shipment; Mill Test Certificates (EN 10204 3.1/3.2) are available

• In case of quality issues, retain original packaging and provide relevant photos or third-party inspection reports

• Specific return, exchange, and warranty terms are subject to the final sales contract agreement.

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FAQ

1. Are you trading company or manufacturer ?
    We are manufacturer ,You can see the certification.
2. How long is your delivery time?
    Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to quantity.
3. Do you provide samples ? is it free or extra ?
    Yes, we could offer the sample for free charge but need pay the cost of freight.
4. What is your terms of payment ?
    Payment<=1000USD, 100% in advance. Payment>=1000USD, 50% T/T in advance ,balance before shippment.