SCH 40S Pipe Supplier in China

Q: Is SCH 40S Suitable For High Pressure?

Oui ,SCH 40S is suitable for many high-pressure applications.However,the specific pressure rating depends largely on the pipe diameter,material grade,and operating temperature.

SCH 40S Pipe

En tant que professionnel tuyau en acier inoxydable manufacturer,Kaysuns supplies SCH 40S pipes compliant with ASME,ASTM,and EN standards,providing complete material traceability and inspection documentation.

SCH 40S pipe refers to piping with a specific wall thickness (schedule 40 specification) specifically designed for stainless steel materials,as indicated by the suffix letter “S.”The pipe dimensions comply with the ASME B36.19M standard specification.

Schedule 40S pipe is characterized by its uniform wall thickness design,making it suitable for medium-pressure applications such as water and gas conveyance,as well as structural support.

Within the same diameter range,this specification offers a wall thickness intermediate between lighter-gauge options (e.g., SCH 20) and heavier-gauge alternatives (e.g., SCH 80).This ensures durability while maintaining consistent performance and cross-manufacturer compatibility.

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SCH 40S Pipe Materials

Stainless Steel 304/304L:
304/304L is the most widely used and cost-effective grade,offering good general corrosion resistance and strength.They are a reliable choice for many general applications.
Stainless Steel 316/316L:
The 316/316L grades exhibit superior corrosion resistance due to the addition of molybdenum,particularly excelling in chloride environments,marine settings,and chemical processing applications.
Other Grades:
While less common,grades resistant to intergranular corrosion for specific high-temperature applications are available from Kaysuns,including stainless steel 321 and 347.

SCH 40S:ASME B36.19M Standard

ASME B36.19M is a standard established by the American Society of Mechanical Engineers that specifies the dimensions (outer diameter,wall thickness) of welded and seamless stainless steel pipes,applicable to various systems requiring corrosion resistance.

Scope:Covers dimensions for seamless and welded stainless steel pipes for various temperatures and pressures.
Matériau :Applies to stainless steel(ferritic,austenitic, martensitic,etc.).
Schedules:Uses “S” designations(e.g., 5S, 10S, 40S, 80S)for wall thicknesses,which are distinct from standard B36.10M schedules.
Key Difference from B36.10M:Specifies unique wall thicknesses for certain sizes (like 10S, 12-inch 40S,10/12-inch 80S) that differ from carbon steel pipes,hence the ‘S’ suffix.

Typical Dimensions for SCH 40S Pipe

The outside diameter (OD) for a given Nominal Pipe Size (NPS) remains consistent across all schedules,but the wall thickness changes.For common sizes(NPS 1/8 inch to 10 inches),SCH 40S wall thickness matches standard SCH 40 pipe.For larger sizes(NPS 12 inches and above),SCH 40S typically features thinner walls due to stainless steel material properties and higher allowable stress.

Nominal Pipe Size (NPS)	Outside Diameter (OD)	Épaisseur du mur	Approx. Weight per Foot (Stainless Steel)
1/2 in.	0.840 in. (21.3 mm)	0.109 in. (2.77 mm)	0.851 lbs/ft
1 in.	1.315 in. (33.4 mm)	0.133 in. (3.38 mm)	1.68 lbs/ft
2 in.	2.375 in. (60.3 mm)	0.154 in. (3.91 mm)	3.654 lbs/ft
4 in.	4.500 in. (114.3 mm)	0.237 in. (6.02 mm)	10.794 lbs/ft
6 in.	6.625 in. (168.3 mm)	0.280 in. (7.11 mm)	18.981 lbs/ft
10 in.	10.750 in. (273.1 mm)	0.365 in. (9.27 mm)	40.498 lbs/ft

SCH 40S Pipe Manufacturing Process

Material Preparation

First,select high-quality stainless steel with precise chemical composition.

Pipe Forming

Seamless:
Solid steel billets are drawn over a mandrel to form seamless hollow tubes.
Electric Resistance Welded (ERW):
Steel strip is cold-formed into a tube shape,then the edges are welded together using an electric current.
JCO/UO Process:
A press progressively forms steel plate into “J,” “C,” and “O” shapes.This process is commonly used for larger diameter steel plates.

Welding (ERW/Spiral Weld)

The weld seam is produced using welding techniques, requiring strict process control to ensure quality.

recuit

A heat treatment and cooling process applied to pipes to eliminate internal stresses generated during forming and welding,thereby improving mechanical properties.

Finishing And Testing

Pipes undergo cutting,straightening,and surface treatment,followed by rigorous dimensional inspection to meet the stricter tolerances required for SCH 40S specifications.

SCH 40S Pipe Applications

Chimie et pétrochimie :Convey acids,alkalis,salt solutions,and other corrosive media.
Food & Beverage:High-purity liquid transfer (e.g., beer, milk) and processing,ensuring sanitary safety.
Pharmaceutical & Biotechnology:Handling sensitive materials requiring strict cleanliness standards.
Oil & Gas:Transferring petroleum products and fluids under demanding conditions.
Marine Applications:Resisting corrosion in marine salt environments.
Production d'électricité :Transferring high-temperature,high-pressure steam and fluids.
Water Treatment:Water supply systems and desalination plants.

SCH 40S Pipe FAQs

What is The Difference Between SCH 40 And SCH 40S?

“S” denotes stainless steel,while the other is carbon steel.SCH 40 and SCH 40S have essentially identical dimensions.40 is more affordable.

Is SCH 40S Suitable For High Pressure?

Oui,SCH 40S is suitable for many high-pressure applications.However,the specific pressure rating depends largely on the pipe diameter,material grade,and operating temperature.

What is The Pressure Rating For SCH 40 Pipe?

Schedule 40 pipes typically operate within pressure ranges spanning hundreds to thousands of pounds per square inch (psi).Smaller pipes can withstand higher pressures (e.g., a 1/2-inch PVC pipe can handle approximately 600 psi,while larger steel pipes drop to 200-300 psi),and pressure ratings decrease as temperature increases.

SCH 40S Pipe