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ASTM A795 Fire Sprinkler Pipe – Galvanized & Black Steel Pipe
ASTM A795 Fire Protection Steel Pipe Supplier in China
Xi'an Dongmeng Group Co., Ltd. supplies ASTM A795 fire sprinkler steel pipes for commercial buildings, industrial facilities, warehouses, and fire protection engineering projects. Our supply solutions cover black and hot-dip galvanized steel pipes, lightweight and standard-weight wall thicknesses, ERW and seamless manufacturing options, and project-specific end connections.
ASTM A795/A795M is a steel pipe specification developed specifically for fire protection applications. It covers welded and seamless steel pipes from NPS 1/2" to NPS 10" (DN15–DN250), with specified dimensional, chemical composition, manufacturing, testing, and coating requirements.
For international fire protection contractors, distributors, and EPC procurement teams, we support pipe specification selection, dimensional verification, inspection documentation, export packaging, and bulk-order quotations.
Request a quotation for ASTM A795 fire sprinkler pipes in Schedule 10, Schedule 40, or other applicable wall thicknesses.
ASTM A795 Fire Sprinkler Pipe Specifications
| Parameter | Specification |
|---|---|
| Product Name | ASTM A795 Fire Sprinkler Steel Pipe |
| Material Standard | ASTM A795/A795M-21 |
| Intended Service | Fire Protection Piping |
| Manufacturing Types | Type E (ERW), Type S (Seamless), Type F (Furnace-Welded) |
| Steel Grades | Grade A / Grade B (Type E and Type S) |
| Size Range | NPS 1/2"–10" / DN15–DN250 |
| Outside Diameter | 21.3–273.1 mm |
| Weight Classes | Lightweight / Standard Weight |
| Common Designations | SCH 10, SCH 40 and SCH 30 where applicable |
| Surface Finishes | Black / Hot-Dip Galvanized |
| End Options | Plain, Beveled, Roll-Grooved, Cut-Grooved, Threaded & Coupled |
| Length | Standard Random Lengths / Project-Specific Cut Lengths |
| Joining Methods | Approved Grooved, Welded, Threaded or Plain-End Systems |
| Quality Inspection | Chemical Analysis, Dimensions, Hydrostatic Testing or Permitted NDT, Coating Tests |
| Documentation | MTC, Inspection Reports, Additional Certification as Specified |
| Packing | Steel Bundles / Protective Export Packaging |
| Supply | Wholesale and Project-Based Orders |
Manufacturing types, sizes, surface finishes, pipe-end processing, and documentation are subject to confirmed product availability.
ASTM A795 Pipe Manufacturing Types and Grades
ASTM A795 fire sprinkler pipes can be supplied using different manufacturing processes.
ASTM A795 Type E – ERW Fire Sprinkler Pipe
Electric Resistance Welded (ERW) pipe is manufactured from steel strip or coil and joined through an electric resistance welding process.
Key characteristics:
Longitudinal welded construction
Suitable for common fire sprinkler distribution networks
Available in Grade A and Grade B
Compatible with appropriately specified grooved and other connections
Suitable for project-volume procurement
For Grade B Type E pipe, the welded seam must receive appropriate treatment to satisfy the applicable ASTM A795 seam-condition requirement.
ASTM A795 Type S – Seamless Fire Sprinkler Pipe
Seamless pipe is manufactured without a longitudinal welded seam.
It may be specified where seamless construction is required by the engineering specification.
Key characteristics:
No longitudinal weld seam
Available in Grade A and Grade B
Suitable for approved fire protection piping applications
Can be supplied with applicable wall thicknesses and end finishes
Seamless construction does not automatically establish a higher allowable working pressure. The complete piping system must satisfy the relevant fire protection design requirements.
ASTM A795 Type F – Furnace-Welded Pipe
Type F uses a continuous furnace-butt-welding manufacturing method.
The type is limited by the ASTM A795 manufacturing provisions and is generally associated with smaller pipe sizes.
For modern commercial and industrial sprinkler projects, ERW and seamless products are common purchasing considerations.
ASTM A795 Schedule 10 & Schedule 40 Pipe Size Chart
ASTM A795 includes lightweight and standard-weight fire protection pipe dimensions.
Lightweight pipe is frequently selected for grooved fire sprinkler piping systems, while standard-weight pipe may be preferred where threading or additional wall thickness is required.
ASTM A795 Fire Sprinkler Pipe Dimensions
| NPS | DN | OD (mm) | Lightweight Wall (mm) | Standard Wall (mm) |
|---|---|---|---|---|
| 1/2" | DN15 | 21.3 | - | 2.77 |
| 3/4" | DN20 | 26.7 | 2.11 | 2.87 |
| 1" | DN25 | 33.4 | 2.77 | 3.38 |
| 1-1/4" | DN32 | 42.2 | 2.77 | 3.56 |
| 1-1/2" | DN40 | 48.3 | 2.77 | 3.68 |
| 2" | DN50 | 60.3 | 2.77 | 3.91 |
| 2-1/2" | DN65 | 73.0 | 3.05 | 5.16 |
| 3" | DN80 | 88.9 | 3.05 | 5.49 |
| 4" | DN100 | 114.3 | 3.05 | 6.02 |
| 5" | DN125 | 141.3 | 3.40 | 6.55 |
| 6" | DN150 | 168.3 | 3.40 | 7.11 |
| 8" | DN200 | 219.1 | 4.78 | 7.04 |
| 10" | DN250 | 273.1 | 4.78 | 7.80 |
Dimensional Notes:
Standard-weight pipes through NPS 6 correspond to Schedule 40 dimensions.
Standard-weight NPS 8 and NPS 10 pipes correspond to Schedule 30.
The lightweight dimensions for NPS 8 and NPS 10 are not standard Schedule 10.
Other wall thicknesses may be furnished where the applicable ASTM A795 requirements are satisfied.
Nominal dimensions are provided for product selection. Final orders should specify the standard edition, nominal diameter, wall thickness, tolerances, and approved connection system.
Schedule 10 vs Schedule 40: Which Should You Choose?
Lightweight / SCH 10 fire sprinkler pipe
A practical option where the approved installation allows thinner-wall piping and compatible joining systems.
Potential benefits include reduced steel weight, efficient handling, and lower material consumption.
Standard-weight / SCH 40 fire sprinkler pipe
Suitable when the project requires thicker walls, approved threading, or additional mechanical capacity.
The heavier wall can affect the total material cost and installation weight.
The correct wall thickness should be determined by engineering design, applicable NFPA requirements, and the approved fittings or couplings.
ASTM A795 Chemical Composition
Chemical composition is controlled to ensure material conformity with the applicable ASTM A795 grade and production requirements.
Chemical Composition Limits for Type E and Type S
| Element | Grade A (Max. %) | Grade B (Max. %) |
|---|---|---|
| Carbon (C) | 0.25 | 0.30 |
| Manganese (Mn) | 0.95 | 1.20 |
| Phosphorus (P) | 0.035 | 0.035 |
| Sulfur (S) | 0.035 | 0.035 |
These values apply to Type E and Type S pipe under the specified material requirements. Type F has separate provisions.
For projects requiring additional mechanical property guarantees, buyers should include the required tensile strength, yield strength, and test documentation in the purchase specification.
Procurement Note: ASTM A795 and ASTM A53 use separate material specifications. Do not assume that identical grade letters establish identical mechanical-property requirements or automatic dual-standard conformity.
Black Steel vs Hot-Dip Galvanized ASTM A795 Pipe
ASTM A795 fire sprinkler piping is available with black or hot-dip galvanized finishes.
Black ASTM A795 Fire Sprinkler Pipe
Black steel pipe is frequently used for fire sprinkler systems where the approved design and environmental conditions permit it.
Possible characteristics include:
Uncoated steel surface or specified temporary protective finish
Suitable for approved fire sprinkler systems
Compatible with appropriate fire protection joining methods
Often economical for large-scale sprinkler piping
Hot-Dip Galvanized ASTM A795 Pipe
Hot-dip galvanized fire sprinkler pipe has zinc coating on the interior and exterior surfaces.
The zinc layer provides corrosion protection under suitable environmental conditions.
For galvanized ASTM A795 pipe, the specified coating mass requirements include:
| Requirement | Zinc Coating Mass |
|---|---|
| Average of Two Test Specimens | Minimum 460 g/m² (1.5 oz/ft²) |
| Each Individual Specimen | Minimum 400 g/m² (1.3 oz/ft²) |
| Coating Test Method | ASTM A90/A90M |
The coating mass is determined using the applicable combined inside and outside coated surface areas.
Important: Galvanized pipe is not automatically immune to corrosion. Moisture accumulation, oxygen exposure, water chemistry, and sprinkler system configuration must be considered during material selection.
Where an FM-approved product specification imposes additional coating requirements, the actual manufacturer's approved product documentation should be followed.
Fire Sprinkler Pipe End Connections
Connection compatibility is one of the most important considerations when purchasing ASTM A795 steel pipes.
Roll-Grooved Ends
Roll-grooved pipe can be used with compatible mechanical coupling systems.
Common advantages include efficient assembly, reduced field welding, and easier alignment in some installations.
Threaded and Coupled Ends
Threaded pipe is commonly associated with suitable standard-weight fire protection piping.
Threaded ends must comply with the specified thread standard and have sufficient remaining wall thickness.
Plain or Beveled Ends
Plain and beveled ends may be suitable for specified welding or plain-end mechanical fitting arrangements.
End Connection Selection
| End Type | Common Application | Technical Requirement |
|---|---|---|
| Roll-Grooved | Mechanical sprinkler piping connections | Groove and coupling compatibility |
| Cut-Grooved | Suitable heavier-wall pipe | Required remaining wall thickness |
| Threaded | Small to medium approved connections | Thread dimensions and wall thickness |
| Beveled | Welded piping assemblies | Approved welding procedure |
| Plain End | Welding or suitable mechanical fittings | Fitting compatibility |
Lightweight pipe should not automatically be specified for threading. The selected connection must comply with the actual pipe dimensions and approved installation requirements.
ASTM A795 Fire Sprinkler Pipe Applications
Commercial Building Sprinkler Systems
Fire sprinkler piping is used in shopping malls, offices, hotels, commercial buildings, and other occupancies requiring automatic fire suppression systems.
Industrial Warehouse Fire Protection
ASTM A795 steel pipe can be specified for suitable warehouse sprinkler networks, including branch lines, cross mains, and sprinkler distribution mains.
Pipe diameter, wall thickness, and connection selection must follow approved hydraulic calculations.
Manufacturing Plants
Industrial facilities may require fire sprinkler pipe suitable for complex overhead pipe networks and demanding installation environments.
Logistics and Distribution Centers
Large distribution facilities often require extensive piping networks where weight, connection efficiency, reliable dimensions, and procurement coordination are important.
Dry-Pipe and Preaction Systems
Suitable black or galvanized steel pipe may be specified depending on the approved system design and corrosion prevention strategy.
For dry and preaction systems, water drainage, trapped moisture, and oxygen exposure can affect long-term pipe performance.
Fire Protection Risers and Distribution Mains
ASTM A795 piping may be used in appropriate riser and distribution applications when allowed by the engineering design, system standards, and product approvals.
ASTM A795 and NFPA 13 Compliance
ASTM A795 is a recognized material specification for fire protection piping and is referenced within fire sprinkler installation requirements.
NFPA 13 establishes installation and design requirements for automatic sprinkler systems.
However, material specification conformity alone is not sufficient to approve a complete fire sprinkler installation.
Engineers and contractors should verify:
Applicable NFPA edition
Pipe material and wall thickness
Hydraulic design calculations
Maximum working pressure
Installation conditions
Approved joining systems
Product listings where required
Authority Having Jurisdiction (AHJ) requirements
UL Listed & FM Approved Fire Sprinkler Pipes
Some fire protection projects require UL Listed or FM Approved piping products.
These approvals must be verified separately from ASTM A795 material compliance.
ASTM A795 compliance does not automatically mean UL Listed or FM Approved.
When requesting certified products, customers should specify the applicable listing or approval requirement, pipe sizes, wall thicknesses, manufacturing type, and destination project.
Xi'an Dongmeng Group Co., Ltd. can review these documentation requirements when preparing project quotations. Product-specific certification and supply availability require confirmation before order acceptance.
ASTM A795 vs ASTM A53 Fire Protection Pipe
ASTM A795 and ASTM A53 are both encountered in fire protection piping specifications, but they differ in their primary intended applications.
| Feature | ASTM A795 | ASTM A53 |
|---|---|---|
| Primary Application | Fire Protection Piping | General Mechanical and Pressure Piping |
| Typical Use | Fire Sprinkler Systems | General Industrial Piping and Permitted Fire Protection |
| Size Range | NPS 1/2"–10" | NPS 1/8"–26" |
| Grades | Grade A / B for Type E and S | Grade A / B |
| Surface Finishes | Black / Galvanized | Black / Galvanized |
| Wall Options | Lightweight / Standard Weight | Applicable Pipe Schedules |
| Fire Protection Suitability | Specifically Intended for Fire Protection | Permitted Where Applicable Requirements Allow |
Which Specification Should You Purchase?
Select ASTM A795 when your purchasing specification identifies fire protection pipe under this standard.
ASTM A53 may be an acceptable alternative where the approved engineering specification and governing requirements permit it.
For international EPC projects, any material substitution should be approved before purchasing or installation.
Quality Inspection and Testing
Fire protection piping requires consistent manufacturing quality and material traceability.
Inspection and testing should follow the specified ASTM A795 edition and any additional purchase-order requirements.
Quality Control Checklist
| Inspection Item | Verification |
|---|---|
| Chemical Analysis | Steel composition against the specified grade |
| Dimensional Inspection | OD, wall thickness, pipe length and end dimensions |
| Weld Integrity | Applicable weld examination and quality |
| Hydrostatic Test | Required pipe integrity examination |
| Nondestructive Examination | Permitted electrical or other applicable NDT |
| Flattening Test | Applicable manufacturing quality test |
| Zinc Coating Test | ASTM A90/A90M where galvanized |
| Surface Inspection | Visual quality and coating condition |
| Pipe Marking | Manufacturer, standard, type and other applicable traceability |
| Material Certification | Mill test and agreed inspection documentation |
Hydrostatic Testing
ASTM A795 specifies hydrostatic testing requirements for pipe integrity.
Where permitted by the standard and accepted by the purchaser, appropriate nondestructive electrical testing can be used as an alternative.
Hydrostatic manufacturing test pressure must not be confused with the allowable working pressure of the installed fire sprinkler system.
Mill Test Certificate
An MTC should identify the material specification, manufacturing type, dimensions, and relevant inspection and traceability information.
Project-specific documentation requirements should be confirmed before production.
Custom Processing and Bulk Supply Options
Xi'an Dongmeng Group Co., Ltd. supports project-based steel pipe orders with processing and supply arrangements matched to customer requirements.
Pipe Specifications
Select the applicable manufacturing type, grade, outside diameter, wall thickness, and surface finish.
End Processing
Specify plain ends, bevels, rolled grooves, cut grooves, or threaded-and-coupled connections, subject to technical compatibility.
Length Requirements
Standard random lengths and project-specific cut lengths may be coordinated according to order size and manufacturing capabilities.
Inspection Documentation
Customers may request specified test reports, traceability records, coating inspection documentation, or independent inspection arrangements.
Packaging and Export
Export arrangements can include bundled pipes, protective packaging, identification labels, and customized shipping documentation.
For bulk orders: Send the full size list, required quantities, approved pipe specification, destination port, and delivery schedule for a consolidated quotation.
Why Choose Xi'an Dongmeng Group Co., Ltd.?
Fire Protection Pipe Selection Support
We assist customers in reviewing ASTM A795 material grades, manufacturing options, lightweight and standard-weight dimensions, and applicable end connections.
B2B and Project-Based Procurement
Our supply coordination supports international distributors, construction companies, EPC contractors, and industrial procurement teams.
Quality and Documentation Coordination
We help customers specify material certificates, testing records, zinc coating inspection, and additional project documentation before order confirmation.
Customized Order Requirements
Customers can submit detailed size lists, end-processing requirements, packing instructions, and installation-related specifications for supply review.
International Export Support
We coordinate quotation requirements, packaging arrangements, and export documentation for international project orders.
From material selection to export coordination, our goal is to help buyers obtain correctly specified steel pipe for their approved fire protection projects.
Frequently Asked Questions About ASTM A795 Fire Sprinkler Pipe
Q1. What is ASTM A795 fire sprinkler pipe?
ASTM A795 is a specification for black and hot-dip galvanized welded and seamless steel pipe intended for fire protection systems.
Q2. What sizes are covered by ASTM A795?
The standard covers nominal sizes from NPS 1/2" to NPS 10", equivalent to DN15–DN250.
Q3. Is ASTM A795 available in Schedule 10 and Schedule 40?
Yes. ASTM A795 includes lightweight and standard-weight pipe dimensions. However, Schedule 10 and Schedule 40 terminology does not correspond to every size in the standard.
Q4. Is ASTM A795 pipe available in galvanized and black finishes?
Yes. Both surface finishes are covered by the specification.
Q5. Is ASTM A795 fire sprinkler pipe UL Listed?
Not automatically. A product must have a valid, applicable listing to be described as UL Listed.
Q6. What is the difference between ASTM A795 and ASTM A53?
ASTM A795 is specifically intended for fire protection piping, while ASTM A53 is a general-purpose pipe specification that may also be used in permitted fire protection applications.
Q7. Can ASTM A795 lightweight pipe be threaded?
Lightweight pipe is generally suited to compatible rolled-groove, welded, or plain-end connection systems. Threading must only be used where permitted by actual wall thickness and applicable requirements.
Q8. What is the minimum zinc coating for galvanized ASTM A795 pipe?
The ASTM A795 specification requires a minimum two-specimen average coating mass of 460 g/m², with individual specimen requirements also applying.
Q9. What is the standard length of ASTM A795 pipe?
Single random lengths are typically specified within 16–22 ft (approximately 4.9–6.7 m), unless otherwise agreed. Project-specific lengths can be requested subject to manufacturing feasibility.
Q10. Can ASTM A795 pipe be used in dry sprinkler systems?
It may be used in suitable dry sprinkler systems when permitted by the approved design. Corrosion control, drainage, and environmental conditions must be considered.
Q11. Can you supply grooved ASTM A795 pipes?
Grooved end processing can be included in a quotation where the pipe dimensions, connection system, and approved manufacturing arrangements are compatible.
Q12. How can I get a wholesale quotation for ASTM A795 fire sprinkler pipe?
Send the required steel grade, manufacturing type, pipe sizes, wall thickness, finish, connection method, quantity, required approvals, and destination port.
Contact Us – ASTM A795 Fire Sprinkler Pipe Supplier
Request a Quote for ASTM A795 Galvanized & Black Fire Protection Steel Pipes
Are you sourcing ASTM A795 fire sprinkler pipes for a warehouse, industrial facility, commercial building, or international fire protection project?
Xi'an Dongmeng Group Co., Ltd. supports B2B buyers with pipe specification review, material supply coordination, and export quotation services.
Tell Us Your Project Requirements
| Information | Example |
|---|---|
| Standard | ASTM A795/A795M |
| Manufacturing Type | Type E / Type S |
| Grade | Grade A / Grade B |
| Size | NPS 1", 2", 4", 6" |
| Wall Thickness | Lightweight / SCH 40 / Specified Wall |
| Finish | Black / Hot-Dip Galvanized |
| Pipe Ends | Plain / Grooved / Threaded |
| Certification | MTC / Product-Specific UL/FM if Required |
| Quantity | Metres / Pieces / Tons |
| Delivery | Destination Port and Required Date |
Contact Xi'an Dongmeng Group Co., Ltd. today to discuss your ASTM A795 fire sprinkler pipe requirements and request a tailored quotation.
Request a Quote | Send Your Size List | Contact Our Sales Team
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