Valve materials and size limits: Brass valves are typically manufactured and applied up to what nominal pipe size range (inches) in industrial service?

Introduction / Context:
Valve body material selection balances corrosion resistance, mechanical strength, cost, and manufacturability. Brass is widely used for small utility and instrumentation services, but its application is usually limited to smaller nominal sizes.

Given Data / Assumptions:

• General service valves (e.g., globe, gate, ball, needle) in non-severe conditions.
• Standard pressure classes; not specialized high-temperature or corrosive alloys.
• Focus on typical procurement practice rather than exceptional custom builds.

Concept / Approach:
Brass valves are favored in small sizes due to ease of casting and machining, sufficient strength for low-to-moderate pressure, and low cost. As sizes increase, weight, cost, and pressure class limitations make steel, bronze, or stainless bodies more appropriate. Hence, brass valves are commonly found up to about 2 inches nominal pipe size.

Step-by-Step Solution:

Verification / Alternative check:
Supplier catalogs list extensive brass offerings through 1/8″ to 2″, with larger sizes sparse or unavailable compared to bronze/steel lines.

Why Other Options Are Wrong:

• ≤ 1 inch: too restrictive; many brass valves exist up to 2 inches.
• > 2.5 or > 3.5 inches: uncommon in brass for industrial duty due to strength and cost considerations.

Common Pitfalls:
Assuming brass suitability for high-temperature or high-pressure services; overlooking dezincification in aggressive waters where bronze or stainless may be preferred.

Final Answer:
≤ 2 inches