Understanding Steel Pipes: 6 Common Types, Their Uses & Grades

Understanding Steel Pipes: 6 Common Types, Their Uses & Grades

Steel pipes are the backbone of countless industries — from construction and energy to oil & gas and marine infrastructure. But choosing the right pipe isn't just about size — material grade, coating, and intended use are just as critical.

Here’s a concise guide to 6 key steel pipe types, their standard grades, and typical applications:

1️⃣ Carbon Steel Pipe

Grades: ASTM A106 (B, C), ASTM A53, API 5L (Gr. B, X42–X70)

 Used in: Steam lines, pipelines, structural supports

 Why: High strength & heat resistance 🔥

2️⃣ Galvanized Steel Pipe

Grades: ASTM A53 (Types E, F, S), ASTM A123 (zinc coating)

 Used in: Water distribution, outdoor frameworks

 Why: Corrosion-resistant due to zinc coating 🛠️

3️⃣ Black Steel Pipe

Grades: ASTM A53, API 5L

 Used in: Gas lines, fire sprinkler systems, HVAC

 Why: Ideal for non-corrosive indoor use ⚙️

4️⃣ Alloy Steel Pipe

Grades: ASTM A335 (P1–P91), ASTM A213

 Used in: Power plants, petrochemical refineries

 Why: Handles high temperatures & pressures 💪

5️⃣ Stainless Steel Pipe

Grades: ASTM A312 (304, 304L, 316, 316L)

 Used in: Food processing, pharmaceuticals, water treatment

 Why: Excellent corrosion resistance & hygiene ✅

6️⃣ Duplex Stainless Steel Pipe

Grades: ASTM A790 (UNS S31803, S32205), Super Duplex 2507

 Used in: Offshore rigs, desalination plants

Selecting the right steel pipe isn't optional — it's essential. It impacts safety, compliance, and performance across every project. Material knowledge = better design, smarter procurement, and stronger infrastructure.