UL List Steel Pipe
UL List Steel Pipe
Size Range and Application
Size:ODΦ21.3mm-323.9mm WT：2.77-10.31mm（SCH40）
Usage:Used for sprinklers fire protection service
Standard and material:ASTM A53 GR.B
Type：seamless or welded as the construction design
As the leading manufacturer and supplier of fire fighting pipe, we have UL certificate for sprinkler steel pipes and fittings. With the most advanced pipe processing technology and equipment, we are specialized in providing more convenient & reliable fire fighting products.
| Standard and material | （Chemical Composition） | （Mechanical Properties） | |||||||||
| C | Mn | P | S | Cu | NI | Cr | Mo | V | Tensile Strength（Mpa） | Yield Strength（Mpa） | |
| ASTM A53 GR.B | ≤0.30 | ≤1.20 | 0.05 | 0.045 | 0.40 | 0.40 | 0.40 | 0.15 | 0.08 | ≥415 | ≥240 |
Pipe ends Finished: Rolled Groove end , Slotted end.
The end is available for slotted accessorices connected, such as slotted clamp, slotted elbow and tee.
Certificate
Fire Sprinkler Pipe is UL and FM certificate Approved
1. Factory
The factory is in Tianjin city China
2. Weights
The weight shall not vary more than +/-5% from that prescribed.
3. Diameter
For pipe NPS 1/2-11⁄2 (DN 40) , the outside diameter at any point shall not vary more than 1⁄64 inch (0.4 mm) over nor more than 1⁄32 inch (0.8 mm) .
For pipe NPS 2 (DN 50)-10 (DN250), the outside diameter shall not vary more than +/-1 % .
4. Thickness
The minimum wall thickness at any point shall not vary more than 12.5 % under the nominal wall thickness.
5. Sample Service
Free Sample, will charge INT’L Courier
ERW BLACK Pipes. Electric Resistance Welded (ERW) Pipes are manufactured from Hot Rolled Coils / Slits. All the incoming coils are verified based on the test certificate received from steel mill for their chemistry and mechanical properties. ERW pipe is cold-formed into a cylindrical shape, not hot-formed.
Seamless pipe is manufactured by extruding the metal to the desired length; therefore ERW pipe have a welded joint in its cross-section, while seamless pipe does not have any joint in its cross-section through-out its length. In Seamless pipe, there are no welding or joints and is manufactured from solid round billets.
The 3 elements of pipe dimension Dimension Standards of carbon and stainless steel pipe (ASME B36.10M & B36.19M) Pipe Size Schedule (Schedule 40 & 80 steel pipe means) Means of Nominal Pipe Size (NPS) and Nominal Diameter (DN) Steel Pipe Dimension Chart (Size chart) Pipe Weight Class Schedule (WGT)
Seamless pipes are manufactured using a piercing process, where a solid billet is heated and pierced to form a hollow tube. Welded pipes, on the other hand, are formed by joining two edges of steel plates or coils using various welding techniques.
The ASTM International specifications for steel tubes list standard requirements for boiler and super heater tubes, general service tubes, steel tubes in refinery service, heat exchanger and condenser tubes, mechanical and structural tubing.
The other main reason hot-dip galvanizing provides better corrosion protection is that the coating is applied during the fabrication process before the steel is installed. This means that any areas that are cut or damaged during installation will still have a protective coating. Other methods of galvanizing, like pre-galvanizing, coat the steel before it is cut and fabricated. This leaves any areas that are cut or damaged during installation vulnerable to rust and corrosion.
