CUNI Threaded Hex Cap ASTM B466 UNS C715000 2" SCH40 Class 3000# ASME B16.11

Product Specification

CUNI Threaded Hex Cap  ASTM B466 UNS C715000 2" SCH40 Class 3000# ASME B16.11

1. Product Description

This product is a threaded hex cap manufactured from UNS C71500 (70/30 Copper-Nickel alloy / CuNi 70/30) in accordance with ASTM B466 and ASME B16.11 standards. Also known as CuNi 70/30 or Werkstoff Nr. 2.0882, this alloy contains approximately 70% copper and 30% nickel, with small additions of iron and manganese to enhance strength and corrosion resistance. A hex cap is a forged pipe fitting with a hexagonal head designed to provide a threaded closure for the end of a pipe or fitting. This 2" SCH40 Class 3000# fitting features a female NPT threaded connection, providing a permanent seal for small-bore piping systems in high-pressure and corrosive service applications.

2. Key Product Parameters

3. Application / Usage

This threaded hex cap is ideal for seawater and corrosive fluid systems requiring threaded closures:

• Marine & Shipbuilding: Seawater piping systems, ballast lines, firewater systems

• Offshore Oil & Gas: Platform piping, subsea applications, seawater injection lines

• Power Generation: Condenser cooling water systems, heat exchangers

• Chemical Processing: Chloride-containing environments where stainless steel may suffer SCC

• Heat Exchangers: Closure for unused ports and fittings

• Pressure Testing: Sealing pipe ends during hydrostatic testing

4. Advantages

• Superior Corrosion Resistance: Exceptional resistance to seawater, pitting, crevice corrosion, and chloride stress corrosion cracking

• Higher Strength: 70/30 CuNi offers better strength and erosion resistance than 90/10 CuNi

• Biofouling Resistance: Copper content naturally inhibits marine biological growth

• Hexagonal Head Design: Provides easy installation and removal with standard wrenches

• Threaded Convenience: No welding required; fast installation and easy disassembly for maintenance

• High-Pressure Rating: Class 3000# suitable for demanding high-pressure applications

• Excellent Weldability: Readily weldable using standard processes

5. Functions

The threaded hex cap provides a permanent, pressure-rated threaded closure 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 cleaning, or serve as a test port during pressure testing. The hexagonal head allows for easy wrench tightening and removal, facilitating system maintenance and modification.

6. Installation Instructions

1. Unpacking Inspection: Check for transit damage; verify markings, dimensions, and pressure class per ASME B16.11

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

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

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

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

6. Inspection: After installation, perform leak test per system requirements

7. Precautions

• Cleanliness: Requires a higher degree of cleanliness than carbon steel fabrication; use dedicated tools to prevent contamination

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

• Temperature Limit: For aqueous corrosion service, verify system conditions for temperatures above 300°C

• Medium Compatibility: Not recommended for use with strong oxidizing acids (e.g., nitric acid) or ammonia systems

• Bolting Torque: Do not exceed recommended torque to prevent gasket damage or flange distortion

• Vibration Sensitivity: Threaded fittings are not recommended on lines subject to significant vibration, thermal shock, or hazardous fluid service

8. Shipping & Delivery

• Standard delivery time is typically 15–30 days, subject to order quantity, pressure class, 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, with Mill Test Certificates (EN 10204 3.1/3.2) available

• Third-party inspection (ABS, DNV, CCS, LR, BV, etc.) available upon request

• 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.

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.