info@baolaipipes.com 
+86-13821217904
Products
If you are interested in procuring BAOLAI® products, we encourage you to reach out to us for a free quote today.
ASTM A135 ERW Fire Sprinkler pipe
Grades: Grade A & Grade B
Size Range ½″ to 12″ (DN15–DN300)
Wall Thickness: Schedule 10, Schedule 40, Schedule 80
End: Finish Plain, threaded (NPT/BSPT), roll‑grooved
Surface: Black, hot‑dip galvanized, epoxy‑coated, red‑painted
Certifications: UL Listed, FM Approved (upon request)
Product Description
What Are ASTM A135 Fire Sprinkler Pipes?
ASTM A135 fire sprinkler pipes are electric-resistance-welded (ERW) steel pipes manufactured to the ASTM A135 standard and used extensively in water‑based fire sprinkler systems. As a recognized fire protection steel pipe standard, ASTM A135 defines the material, mechanical, and dimensional requirements for ERW pipes in automatic sprinkler installations.
Material & Manufacturing
ASTM A135 pipes are made via the ERW process: steel coils are formed into a tube and welded longitudinally. Two grades are offered:
- Grade A – Lower tensile strength, suitable for standard wet‑pipe systems
- Grade B – Higher tensile strength, for higher‑pressure or dry‑pipe applications
Pipes are typically supplied as black fire sprinkler pipes (uncoated) or hot‑dip galvanized fire sprinkler pipes for corrosion resistance in dry, pre‑action, or outdoor environments.
Applications
ASTM A135 ERW fire sprinkler pipes are used in:
- Wet‑pipe sprinkler systems
- Dry‑pipe sprinkler systems (requires galvanized finish)
- Pre‑action systems (data centers, museums)
- Deluge systems (high‑hazard industrial areas)
- Commercial buildings, warehouses, factories, parking garages, and residential towe
Why Choose ASTM A135 Fire Sprinkler Pipes?
- ✅ Lower cost – ERW is more economical than seamless
- ✅ Consistent quality – Tight tolerances from automated coil‑fed production
- ✅ Easy fabrication – Excellent for threading, grooving, and cutting on‑site
- ✅ Certification flexibility – Available with UL/FM listings to satisfy local codes
- ✅ Global acceptance – Recognized across North America, Middle East, Asia, and beyond
Baolai International – Your Trusted Supplier
At Tianjin Baolai International Trade Co., Ltd., we manufacture ASTM A135 fire sprinkler pipes in our own group factories. With 8 ERW production lines and 5 hot‑dip galvanizing lines, we supply Schedule 10, Schedule 40, and Schedule 80 pipes from ½″ to 12″, in black, galvanized, red‑painted, or epoxy‑coated finishes. All fire protection steel pipe is produced under our UL and FM dual‑certified quality system – a distinction held by only a handful of Chinese manufacturers.
Whether you need UL listed fire sprinkler pipe for a commercial high‑rise or FM approved sprinkler pipe for a warehouse, we deliver consistent quality, competitive pricing, and fast lead times.
📞 Contact our sales team today for a quotation or technical datasheet.