High-Pressure Stainless Steel 150# 90-Degree Threaded Elbow Fittings

Overview

The High-Pressure Stainless Steel 150# 90-Degree Threaded Elbows are precision-engineered pipe fittings designed to change direction in high-pressure threaded systems while ensuring leak-free connections and structural stability. Made from 304 or 316 stainless steel, these elbows feature NPT threads (ANSI B1.20.1) and a 1.5D radius, ideal for industrial and commercial applications requiring both strength and corrosion resistance.

Features

Premium Material & Threading:

Constructed from ASTM A312 stainless steel (304 or 316), with a minimum tensile strength of 515 MPa and elongation ≥30% for impact resistance in high-pressure scenarios.

Female NPT threads (60° angle, 11.5 threads per inch for 1/2"-2" sizes) machined to ±0.05mm tolerance, tested to 1.5x working pressure (150 PSI for 150# rating).

Flow & Stress Optimization:

1.5D centerline radius (ANSI B16.11 compliant) reduces flow resistance and turbulence, achieving Cv values 10% higher than standard short-radius elbows.

Reinforced heel and toe sections (1.2x wall thickness) withstands thermal expansion and vibration, critical for pump and compressor connections.

Versatile Compatibility:

Connects to carbon steel, stainless steel, and plastic pipes with NPT threads, suitable for air, water, oil, and non-corrosive gas applications.

Available in sizes 1/8" to 4" NPS, with schedule 40 (standard pressure) and schedule 80 (high-pressure) options (up to 3,000 PSI for schedule 80).

Compliance & Finish:

Meet ASME B16.11 and MSS SP-83 standards, with optional electropolishing (Ra ≤0.8μm) for high-purity systems in pharmaceutical and semiconductor industries.

Passivated surface (for 316 elbows) reduces metal ion leaching, ensuring compliance with FDA 21 CFR Part 177 for food-grade applications.

Application

Ideal for high-pressure and corrosive environments:

Industrial Hydraulics: Redirecting hydraulic fluid in machinery and automation systems, with 316 elbows resisting degradation from oil additives.

HVAC Systems: Condensate and refrigerant lines in commercial buildings, with 304 elbows providing reliable connections in humid environments.

Chemical Labs: High-purity chemical transfer lines, with electropolished 316 elbows minimizing contamination risks in reagent delivery systems.

Marine Hardware: Connecting onboard freshwater and fuel lines, with 316 stainless steel enduring saltwater spray and corrosion for 10+ years.

FAQ

Q: Can these elbows be used with British Standard Pipe (BSP) threads?

A: No, they feature NPT threads; use a NPT-to-BSP adapter for compatibility with metric thread systems.

Q: What thread sealant is recommended?

A: Use PTFE tape or pipe dope for water/gas; for high-pressure oil systems, consider anaerobic sealants for enhanced leak resistance.

Q: How to prevent galling in stainless steel threads?

A: Apply anti-seize compound (nickel-based for high temperatures) and avoid over-tightening beyond the recommended torque (e.g., 40 N·m for 1" elbows).

Q: Are there fire-safe options for flammable media?

A: While not fire-rated, 316 stainless steel’s high melting point (1,400°C) makes it suitable for moderate fire-risk environments when paired with metal gaskets.