What is sch 40 ss pipe?

What Does "Schedule 40" Mean?

In piping standards (such as ASME B36.10M or B36.19M), "Schedule" (abbreviated as Sch) designates the wall thickness of the pipe.

Schedule 40 is one of the most common schedules, offering a balance between strength and flow capacity.

As the nominal diameter increases, the wall thickness increases as well.

It applies to both seamless and welded stainless steel pipes.

Key Characteristics of Sch 40 SS Pipe:

Property	Description
Material	Stainless steel (typically 304, 304L, 316, 316L)
Standard	ASTM A312 / A213 / A269
Wall Thickness	Defined per NPS (e.g., 0.154" for 2" pipe)
Pressure Rating	Suitable for medium-pressure systems
Applications	Water, gas, oil, steam, chemical process, structural

 

schedule 40 stainless steel pipe Applications:

Plumbing & Water Supply

Industrial Piping Systems

Oil & Gas

Food and Beverage Processing

Pharmaceuticals

Construction (Structural Tubing)

 

schedule 40 stainless pipe Dimensions

Spec	Value
NPS	2 inch
OD	60.3 mm (2.375")
Wall Thickness	3.91 mm (0.154")
Material Grades	304, 316, 316L, etc.

 

Is Schedule 40 the same as STD (standard)?
Yes, for stainless steel and carbon steel, Sch 40 and STD (Standard Wall) are often equivalent for many pipe sizes.

 What is the difference between Sch 40 and Sch 80?
Schedule 80 pipes have thicker walls than Schedule 40, offering higher pressure resistance but lower internal diameter (flow capacity).

Can Schedule 40 stainless pipe be threaded?
Yes, especially for smaller diameters (NPS ≤ 2"), Sch 40 SS pipes can be threaded if specified.