20''-60'' CARBON STEEL LSAW WELDED PIPE API/ASTM/JIS/DIN

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 5 m.t

Supply Capability:: 300 m.t/month

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Packaging & Delivery

Packaging Detail:	standard export packing or as customer's requirement
Delivery Detail:	within 10 - 30 days

Specifications

Spiral Welded Steel Pipes and Tubes
1.Material:Q195-Q235
2.Length:1-12m
3.WT:1.0-14mm
4.O.D.:20-273mm

Product Description:

1.Material : Q235,Q345,L245,L290,L360,L415,L450,L485,GrB,X42,46,X52,X56,X60,X65,X70,X80,X100

2,Standard: SY/T5037-2000,GB/T9711-2011,API Spec 5L PSL1/PSL2,ASTM A252\A53,ISO3183,DIN17172,EN10217,JIS G3457,AWWA C200,ASTM A139,ASTM A671,ASTM A672

3.Wall thickness: 3.0mm-30mm

4.Outer diameter: φ168mm-3020mm

5,Length: 5m-12m or as your requirement

6,Corrosion protection standard: DIN30670,DIN30671, AWWAC210, AWWA C203, SY/T0413-2002,SY/T0414-2002

7,Application: Oil, gas, natural gas, water pipe, thermal electricity pipe, steel structure engineering, etc

Q195-q345 Material Steel Pipe's Materials

Elements Material	Chemical Compsition%					Mechanical Property
	C%	Mn%	S%	P%	Si%	Yield Point (Mpa)	Tensile Strength(Mpa)	Elongation (%)
Q195	0.06-0.12	0.25-0.50	<0.050< span="">	<0.045< span="">	<0.030< span="">	>195	315-430	32-33
Q215	0.09-0.15	0.25-0.55	<0.05< span="">	<0.045< span="">	<0.030< span="">	>215	335-450	26-31
Q235	0.12-0.20	0.30-0.70	<0.045< span="">	<0.045< span="">	<0.030< span="">	>235	375-500	24-26
Q345	<0.20< span="">	1.0-1.6	<0.040< span="">	<0.040< span="">	<0.55< span="">	>345	470-630	21-22

Packaging & Delivery

Packaging Detail:	Normal exporting packing,in container or bulk vessel or as per clients' request
Delivery Detail:	2 months after confimed contract

Specifications

Large Diameter API 5L X70 PSL2 LSAW Steel Pipe
Grade: X42, X46, X50, X52, X60, B, C
OD: 1.5"-28"
WT: SCH10-SCH160
Brand:TPCO

Large Diameter API 5L X70 PSL2 LSAW Steel Pipe

Specifications:

u Standard: API 5L

u Grade: B, C, X42, X46, X50, X52, X56, X60, X65, X70, X80

u OD: 1.5"-28"

u WT: SCH10-SCH160

u Length: 5-12m

u Ends Finish: plain end, bevel end, grooved end

u Surface Treatment: bare, black varnished, oiled finish, red color, anti-corrosion, 3PE, FBE or epoxy coating

u Technique: hot rolled or cold drawn

u Application: api 5l steel pipe for conveying oil, water, gas

u Invoicing: based on theoretical weight or actual weight

u Payment Terms: L/C at sight, T/T or Western Union

u Trade Terms: FOB, CFR, CIF

u Certification: ABS manufacturing assessment, ABS design assessment, API 5CT, API 5L, DNV manufacturer certificate, ISO9001 quality management system certificate, ISO14001 environment management system certificate, GB/T28001 occupational health and safety management system certificate, A1 class manufacturing license of special equipment certificate, CCS, GL, LR, SGS, TüV, PDE

Q:Can steel pipes be used for both high-pressure and low-pressure systems?: Yes, steel pipes can be used for both high-pressure and low-pressure systems. Steel is known for its durability, strength, and resistance to extreme conditions, making it suitable for various applications. Whether it is transporting liquids or gases in high-pressure systems or low-pressure systems, steel pipes can efficiently handle the demands of both.

Q:Can steel pipes be used for underground water supply pipelines?: Yes, steel pipes can be used for underground water supply pipelines. Steel pipes are commonly used for water supply systems due to their durability, strength, and resistance to corrosion. They can withstand high pressure and are capable of carrying large volumes of water. Additionally, steel pipes are also available in various sizes and thicknesses, allowing for flexibility in designing and installing underground water supply pipelines. However, it is important to ensure that the steel pipes are properly coated or lined to prevent corrosion and maintain the quality of the water being transported. Regular inspections and maintenance should also be conducted to prevent any potential issues with the steel pipes.

Q:How do you calculate the pressure drop in a steel pipe?: When determining the pressure decrease in a steel pipe, various factors need to be taken into account. These factors include the pipe's diameter and length, the fluid's flow rate, and the fluid's properties. One commonly utilized equation for calculating the pressure drop in a pipe is the Darcy-Weisbach equation. This equation is as follows: ΔP = (f * (L / D) * (ρ * V^2)) / (2 * D) In this equation: - ΔP represents the pressure drop in the pipe - f denotes the Darcy friction factor, which relies on the pipe's roughness and Reynolds number - L refers to the pipe's length - D represents the pipe's diameter - ρ signifies the fluid's density - V indicates the fluid's velocity To compute the Darcy friction factor, different methods can be employed depending on the flow regime. For laminar flow, the formula f = 16 / Re can be utilized, where Re represents the Reynolds number. For turbulent flow, the friction factor can be determined using various methods, such as the Colebrook equation or the Moody chart. It should be noted that the fluid's properties, such as viscosity and density, may vary with temperature and pressure. Thus, considering these variations is crucial when calculating the pressure drop. Moreover, it is important to acknowledge that additional factors, including fittings, valves, and elbows, can impact the pressure drop in a steel pipe. These factors introduce extra losses, which can be accounted for by employing appropriate correction factors or directly measuring the pressure drop across these components. Overall, calculating the pressure drop in a steel pipe necessitates the use of suitable equations, taking into account the fluid's properties, and considering the various factors that can influence the flow. It is advisable to consult relevant engineering handbooks or employ specialized software for accurate calculations.

Q:How are steel pipes used in the chemical industry?: Steel pipes are commonly used in the chemical industry for various applications including the transportation of corrosive chemicals, as well as for transferring fluids and gases at high temperatures and pressures. These pipes are durable, resistant to corrosion, and can withstand harsh working conditions, making them ideal for handling chemicals in industrial settings.

Q:What is the difference between carbon steel and stainless steel pipes?: The main difference between carbon steel and stainless steel pipes lies in their composition and rust resistance properties. Carbon steel pipes are primarily made of iron and carbon, making them less resistant to corrosion and prone to rusting. On the other hand, stainless steel pipes contain chromium, which gives them excellent rust resistance and durability. This makes stainless steel pipes ideal for use in environments where corrosion is a concern, such as in plumbing systems and industrial applications.

Q:What is the average lead time for manufacturing steel pipes?: The average lead time for manufacturing steel pipes can vary depending on various factors such as size, complexity, and quantity. However, a typical range for lead time is generally around 4 to 8 weeks.

Q:How are steel pipes connected to other plumbing components?: Steel pipes are typically connected to other plumbing components through various methods such as threaded connections, welding, or using compression fittings.

Q:How are steel pipes coated for protection?: Steel pipes are commonly coated for protection using various methods such as galvanization, epoxy coating, and polyethylene wrapping. Galvanization involves immersing the pipes in a bath of molten zinc, forming a protective layer that prevents corrosion. Epoxy coating involves applying a layer of epoxy resin to the pipe surface, providing a barrier against moisture and chemicals. Polyethylene wrapping involves wrapping the pipes with a polyethylene material, offering insulation and protection against abrasion and corrosion. These coating methods ensure the longevity and durability of steel pipes, enhancing their resistance to environmental factors.

Q:What is the production process of seamless steel tube?: Main production process of cold rolled (drawn) seamless steel tube:Blank preparation, pickling, lubrication, cold rolling (drawing), heat treatment, straightening, finishing and inspectionThe production process of seamless steel tube in general can be divided into two kinds of hot rolling and cold drawing, cold-rolled seamless steel pipe production process than hot-rolled billet to complex, first to three roller rolling and extrusion to sizing test, if the tube through the cutting machine cutting surface without crack growth response after cutting blank about one meter. Then enter the annealing process, annealing and pickling to use acid pickling liquid, should pay attention to the surface if there are a lot of bubbling, if there are a large number of bubbling pipe shows that the quality is not up to the standard. The appearance of cold rolling seamless steel tube shorter than hot-rolled seamless steel pipe, cold rolled seamless steel pipe wall thickness is generally higher than hot-rolled seamless steel pipe to be small, but the surface looks better than thick wall seamless steel pipe is more bright, rough surface is not too much, not too much burr diameter.

Q:What is the purpose of galvanizing steel pipes?: The purpose of galvanizing steel pipes is to provide corrosion resistance and extend their lifespan.

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