SCH 80 seamless stainless steel pipe

What is seamless stainless steel pipe?

Seamless stainless steel pipe is a round, square or other shaped pipe made of stainless steel material. No welding process is used in its manufacturing process, so it has better integrity and continuity. Due to its excellent corrosion resistance and aesthetics, stainless steel seamless pipes are widely used in various fluid transportation fields, such as water supply, drainage, sewage treatment, petrochemical industry, medical and food fields.

What is SCH 80?
SCH 80 (Schedule 80 pipe) represents the wall thickness, which refers to XS thickened pipes with a pressure wall thickness less than DN200mm. Usage scenarios generally involve high temperature, high pressure, and highly corrosive conditions. The wall thickness of SCH 80 grade pipes is relatively thick, and the pressure and temperature in the use environment must comply with ASME/ANSI standards to ensure the safety and reliability of the pipeline system. SCH 80 grade piping systems are often used in the manufacture of chemical equipment, high-pressure pipelines, high-temperature heaters and some special piping systems. When designing and installing a steel pipe system, it is necessary to select the appropriate pipe number according to the actual use environment to ensure the stability and safety of the pipeline system.

Features of sch 80 seamless stainless steel pipes:
1. Corrosion resistance: Seamless stainless steel pipes have good corrosion resistance, especially to chloride ions and oxidants. In corrosive media such as acid, alkaline, salt solution and sea water, its corrosion resistance is much higher than that of ordinary steel pipes.
2. High strength: Seamless stainless steel pipes have high strength and stiffness, can withstand high pressure and gravity, and have good earthquake resistance.
3. Aesthetics: Since no welding process is used during the manufacturing process, the seamless stainless steel pipe has a smooth surface, no welds, and is not easy to accumulate scale, so it has good aesthetics and cleanliness.
4. Easy maintenance: Seamless stainless steel pipes have good self-cleaning properties and are not easy to accumulate scale and breed bacteria. Therefore, maintenance is easy and only requires simple cleaning and disinfection.

5. Long service life: Seamless stainless steel pipes have a long service life, generally more than 50 years, and will not suffer from rust and corrosion problems like ordinary steel pipes during use.

Material of stainless steel pipe:

Stainless steel is an alloy material with corrosion resistance, its main components are chromium and nickel. According to different composition ratios, stainless steel can be divided into stainless steel 304, stainless steel 316, stainless steel 321 and other materials. Stainless steel seamless pipes are mainly made of stainless steel 304 and stainless steel 316. Both materials have excellent corrosion resistance and high temperature strength and are widely used in petroleum, chemical, pharmaceutical, food and other industries.

Features and applications of SCH 80 seamless stainless steel pipe:

High pressure resistance, high precision, no deformation during cold bending, no cracks and flattening, no oxide scale, good tensile and impact resistance.

SCH 40 pipe vs SCH 80 seamless stainless steel pipe:

The main difference between SCH 40 and SCH 80 seamless stainless steel pipes is the wall thickness. SCH 40 pipe has a thinner wall thickness and is often used in low-pressure applications such as residential plumbing or irrigation systems. SCH 80 seamless pipe has thicker walls and is used in high-pressure applications such as industrial processes, hydraulic systems and underground piping. They are designed to handle higher pressures and withstand greater stresses than SCH 40 pipe.

Looking at specific dimensions, the wall thickness of SCH 40 pipe is approximately 0.109 inches, while the wall thickness of SCH 80 pipe is approximately 0.154 inches. This means that SCH 80 pipe is approximately 30% thicker than SCH 40 pipe. While SCH 80 pipe is stronger and more durable than SCH 40 pipe, they are also more expensive.

SCH 80 pipe has thicker walls and requires more material and more manufacturing time, which increases costs. When selecting pipe for a specific application, it is important to consider the pressure requirements and the cost-effectiveness of selecting thicker, more expensive pipe.

Pipe Sch 80 Chart, Dimensions, Weight And Pipe Wall Thickness

Nominal size [inches]	Outside diameter [inches]	Outside diameter [mm]	Wall thickness [inches]	Wall thickness [mm]	Weight [lb/ft]	Weight [kg/m]
1/8	0.405	10.3	0.095	2.41	0.31	0.47
1/4	0.54	13.7	0.119	3.02	0.54	0.8
1/2	0.84	21.3	0.147	3.73	1.09	1.62
3/4	1.05	26.7	0.154	3.91	1.47	2.2
1	1.315	33.4	0.179	4.55	2.17	3.24
1 1/4	1.66	42.2	0.191	4.85	3	4.47
1 1/2	1.9	48.3	0.2	5.08	3.63	5.41
2	2.375	60.3	0.218	5.54	5.02	7.48
2 1/2	2.875	73	0.276	7.01	7.66	11.41
3	3.5	88.9	0.3	7.62	10.25	15.27
3 1/2	4	101.6	0.318	8.08	12.5	18.63
4	4.5	114.3	0.337	8.56	14.98	22.32
5	5.563	141.3	0.375	9.53	20.78	30.97
6	6.625	168.3	0.432	10.97	28.57	42.56
8	8.625	219.1	0.5	12.7	43.39	64.64
10	10.75	273	0.594	15.09	64.43	96.01
12	12.75	323.8	0.688	17.48	88.63	132.08
14	14	355.6	0.75	19.05	106.13	158.1
16	16	406.4	0.844	21.44	136.61	203.53
18	18	457	0.938	23.83	170.92	254.55
20	20	508	1.031	26.19	208.87	311.17
24	24	610	1.125	30.96	296.58	442.08

Go here to learn more: Carbon steel vs Stainless steel