Astm A795 Sch40 Fire Fighting Pipe
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Astm A795 Sch40 Fire Fighting Pipe

Name: China Astm A795 Sch40 Fire Fighting Pipe Manufacturers Suppliers Factory - Youfa International Trade
Brand: YOUFA
SKU: 311103773

✔ Category:Fire Sprinkler Steel Pipe
✔ Material:Carbon Stee
✔ Material:Q195, Q235, Q355
✔ Standard:ASTM A53, ASTM A500, A36, ASTM A795,IS065,ANSI C80, DIN2440, JIS G3444.GB/T3091.GB/T13793
✔ Surface:Zinc coating 200-500g/m2(30-70um)0rBlack painted/red painted
✔ Pipe Ends:threaded, grooved;with or without caps
✔ Application:wet pipe sprinkler systems;dry pipe sprinkler systems;pre-action sprinkler systems;deluge systems;etc
✔ MOQ:One container about 28 tons
✔ Production time: usually 25 days
✔ Payment Terms: L/C, D/A, D/P, T/T

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Product Introduction

Tianjin YOUFA International Trade Co.,Ltd is one of the most experienced manufacturers and suppliers of astm a795 sch40 fire fighting pipe in China. Welcome to wholesale bulk high quality customized produts at low price from our factory. For price list and cheap products, contact us now.

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Features of astm a795 schedule 40 Fire Fighting Pipe

ASTM A795 is the dedicated American standard for carbon‑steel fire‑protection pipe; Schedule 40 denotes standard‑weight wall thickness, widely used for wet, dry, pre‑action and deluge sprinkler systems.

Material & manufacturing

Base material: Carbon steel (Grade A / Grade B). ERW welded or seamless pipe, NPS 1/2"‑10" (DN15‑DN250) range.
Surface options: black bare steel or hot‑dip galvanized,red painted coating,epoxy coating (for special corrosion requirements).
Sch40 has thicker wall compared with Sch10, offering higher mechanical strength and pressure resistance.

Mechanical & pressure performance

Rated working pressure: Typically up to 300 psi (2.07 MPa) for fire‑service applications.
Every pipe undergoes hydrostatic leak test or alternative electrical non‑destructive test; welds receive 100 % NDT inspection (stricter than general‑purpose ASTM A53).
Mandatory flattening test to verify ductility and weld integrity; Sch40 performs better in deformation‑resistance than thin‑wall Sch10.
Permitted field bending, with minimum bend inner radius ≥12 × pipe OD at ambient temperature.

End connections

Plain end, Roll‑grooved (grooved coupling), Threaded ends (ANSI B1.20.1),
Beveled ends for welding

Certification

Qualified products carry UL‑listed / FM‑approved marks

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astm a795 sch40 Fire Fighting Pipe Sizes and Dimensions

ASTM A795/A795M Standard Specification Schedule 40 fire sprinkler pipe is a standard-weight fire protection pipe used for sprinkler systems. According to ASTM A795, Schedule 40 dimensions mainly apply to NPS 1/2 through NPS 6 sizes, while larger sizes such as NPS 8 and NPS 10 are generally specified as Schedule 30 under the standard-weight category.

Dimensions, Weights, Test Pressures For Standard-Weight Fire Protection Pipe-Schedule 30 and Schedule 40
NPS Designator	DN Designator	Specified Outside Diameter		Nominal Wall ThicknessA		Weight Plain End		Weight Threaded and CoupledB		Test Pressure,Seamless and ERW
NPS Designator	DN Designator	in.	mm	in.	mm	lb/ft	kg/m	lb/ft	kg/m	psi	MPa
1/2	15	0.84	[21.3]	0.109	[2.77]	0.85	[1.27]	0.85	[1.27]	700	[4800]
3/4	20	1.05	[26.7]	0.113	[2.87]	1.13	[1.69]	1.13	[1.68]	700	[4800]
1	25	1.315	[33.4]	0.133	[3.38]	1.68	[2.50]	1.68	[2.50]	700	[4800]
1 1/4	32	1.66	[42.2]	0.14	[3.56]	2.27	[3.39]	2.28	[3.40]	1000	[6900]
1 1/2	40	1.9	[48.3]	0.145	[3.68]	2.72	[4.05]	2.73	[4.07]	1000	[6900]
2	50	2.375	[60.3]	0.154	[3.91]	3.66	[5.45]	3.69	[5.50]	1000	[6900]
2 1/2	65	2.875	[73.0]	0.203	[5.16]	5.80	[8.64]	5.83	[8.68]	1000	[6900]
3	80	3.5	[88.9]	0.216	[5.49]	7.58	[11.29]	7.62	[11.35]	1000	[6900]
3 1/2	90	4	[101.6]	0.226	[5.74]	9.12	[13.58]	9.21	[13.71]	1200	[8300]
4	100	4.5	[114.3]	0.237	[6.02]	10.80	[16.09]	10.91	[16.25]	1200	[8300]
5	125	5.563	[141.3]	0.258	[6.55]	14.63	[21.79]	14.82	[22.07]	1200	[8300]
6	150	6.625	[168.3]	0.28	[7.11]	18.99	[28.29]	19.2	[28.60]	1200	[8300]
8 (Sch30)	200	8.625	[219.1]	0.277	[7.04]	24.72	[36.82]	25.57	[38.09]	1200	[8300]
10 (Sch30)	250	10.75	[273.1]	0.307	[7.80]	34.27	[51.05]	35.78	[53.29]	1000	[6900]

Important note: Per ASTM A795 standard, NPS 8 (DN200) & NPS 10 (DN250) are Schedule 30, not Sch40; below table lists standard Sch40 range NPS 1/2‑6 (DN15‑150) plus NPS8/10 Sch30 for reference.

Why is ASTM A795 Schedule 40 popular for fire protection systems?

01/

Higher Wall Thickness and Mechanical StrengthASTM A795 Schedule 40 features a thicker wall compared with Schedule 10 pipe, providing higher structural strength and better resistance to impact and external forces. This makes it suitable for demanding fire protection environments such as industrial plants, warehouses, and large commercial buildings.

02/

Higher Pressure Rating for High-Rise Buildings

Sch 40 offers a significantly higher Maximum Allowable Working Pressure-for example, 2" Sch 40 is rated ~300–350 psi versus ~200–250 psi for Sch 10. This provides the safety for high-rise risers, standpipes, and fire pump discharge headers where static pressures often exceed 250 psi.

03/

Designed Specifically for Fire Protection Applications

ASTM A795 is specifically developed for black and galvanized steel pipes used in fire protection systems. The standard ensures consistent material quality, dimensional accuracy, and reliable performance for sprinkler and firefighting applications.

04/

Wide Range of Applications and SizesASTM A795 Schedule 40 pipe is available in various sizes, making it suitable for different fire protection system designs. It is commonly used for sprinkler mains, cross mains, standpipe systems, fire hydrant piping, and industrial fire water networks.

05/

Compatibility with Multiple Connection Methods

ASTM A795 Schedule 40 pipe can be installed using grooved couplings, threaded connections, flanges, or welding methods. This flexibility allows contractors to choose the most efficient installation method according to project requirements.

06/

Available with Different Surface Finishes

Schedule 40 fire protection pipe can be supplied with black, red-painted, galvanized, or other protective coatings. These options allow the pipe to meet different requirements for corrosion protection, appearance, and installation.

ASTM A795 Schedule 40 is popular not because it is the lightest or most hydraulically efficient, but because it provides greater wall thickness, higher strength, better pressure resistance, and excellent durability. At the same time, it is the only safe, compliant, UL/FM certified choice for threaded fire joints.Although it is heavier and more costly than Schedule 10, its enhanced mechanical properties make it an ideal choice for applications requiring additional safety and robustness.

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Frequently Asked Questions

Q:What are Grade A and Grade B under ASTM A795?

ASTM A795 defines two carbon‑steel grades. Grade A is for general‑purpose fire‑protection service. Grade B requires post‑weld heat‑treatment for ERW welded pipe, delivering higher strength and better weld‑zone toughness, preferred for higher‑risk or higher‑pressure fire‑system projects. Both grades are available for SCH40 dimensions.

Q:Can ASTM A795 Sch40 galvanized pipe be field‑bent?

Bending is permitted, but cold bending shall not produce bends with inside bend radius less than 12 × pipe outer diameter. Sharp tight bends may crack the galvanized coating and steel wall. After bending, inspect for coating peeling and repair damaged zinc surfaces

Q:What factory tests are mandatory for ASTM A795 Sch40 pipe?

Each pipe length shall pass hydrostatic leak test, or approved non‑destructive electric test as an alternative. Welded pipes must also complete flattening test to verify weld integrity and material ductility. Chemical and mechanical property tests are performed per production lot

Q:Can ASTM A795 Sch40 galvanized pipe be used for underground fire‑water piping?

Hot‑dipped galvanized ASTM A795 pipe is mainly intended for above‑ground fire‑protection piping. For underground burial, additional anti‑corrosion protection such as wrapping or coating is normally required; bare galvanized pipe is not recommended for direct burial in corrosive soil per most fire codes.

Q:Why choose ASTM A795 Schedule 40 instead of Schedule 10?

Choose ASTM A795 Schedule 40 when the project requires:
Higher mechanical strength
Better impact resistance
Greater wall thickness
More demanding operating conditions
Schedule 10 may be preferred when lower weight, easier installation, and cost savings are the main considerations.

Q:What is the difference between ASTM A795 Schedule 10 and Schedule 40?

The main difference is wall thickness. Schedule 40 has a thicker wall, higher strength, and better mechanical protection, while Schedule 10 is lighter, more economical, and provides better hydraulic efficiency due to its larger internal diameter.

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Youfa Group is a large enterprise group integrating the production and sales of various steel pipes, socket and buckle-type steel pipe supports, high-end welded pipe pipes, pipe fittings and other products. There are two major application fields of Youfa products: steel pipes for fluid transmission and steel pipes for structural support.Youfa brand steel pipes are widely used in construction, steel structure, scaffolding, fire sprinkler system, civil gas pipeline,s and so on.