Stainless Steel pipe (Stainless Steel) is a hollow strip of cylindrical Steel, his scope of application as the pipeline of fluid transport, mainly widely used in petroleum, chemical, medical, food, light industry, mechanical instrumentation and other industrial pipelines and mechanical structural components.  Stainless steel pipes are made of acid and heat resistant billets, heated, perforated, sized, hot rolled and cut.  

Classification of stainless steel pipe: stainless steel seamless steel pipe and stainless steel welded steel pipe (seam steel pipe) basic two categories.  According to the outer diameter shape of steel tube can be divided into round tube and special-shaped tube, what is widely used is circular steel tube, but also have a few square, rectangle, semicircle, hexagonal, equilateral triangle, octagonal special-shaped steel tube.  
 

For the steel pipe under fluid pressure to carry out hydraulic test and ray flaw detection to test its pressure ability and quality, under the specified pressure does not leak, wet or expansion for qualified, some steel pipe according to the standard or the requirements of the side test, flaring test, flattening test.  

Specification: 

A:Stainless steel seamless pipe:

Standard:ASTM A312 Austenitic Stainless Steel Pipes for high-temperature and general corrosive service.
                  ASTM A213 for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes
                  ASTM A269 Austenitic Stainless Steel Tubes for General Service
                  ASTM A270 for Austenitic and Ferritic/Austenitic Stainless Steel Sanitary Tubes

Grade: 
TP304,TP304L,TP304H,TP316,TP316L,TP316Ti,TP309,TP310S,TP321,TP321H, 

TP347, TP347H, TP405, TP410, TP430

Sizes: 1/8" - 36" +
Schedules: S/5s - XXS
Services: Bending - Cutting - Grooving - Polishing - Threading

Surface treatment: Industrial tubes Annealed and pickled, Sanitary tubes polished 180 grit, 240 grit, 400 grit
 

Austenitic steel

TP304	General-purpose stainless steel with good corrosion resistance for most applications. Used for: Bar rails, Boat railings, Canopy supports, Chemical processing equipment, Chemical tubing, Column covers, Duct works, Feed-water tubes, Food preparation equipment, Food processing equipment, Heat exchanger tubes, Hypodermic needles, Ladders, Mechanical & structural components, Pharmaceutical processing equipment, Piping systems, Railings (architectural), Traffic barriers, Water pipes.
TP304H	Higher carbon content than 304L, for increased strength, particularly at elevated temperatures.
TP304L	Chemical plant and food processing equipment, where freedom from sensitization is required in plate thicknesses TP316/316L
TP316/316L	Used where higher corrosion resistance is required. Boat railings, Canopy supports, Chemical tubing, Column covers, Duct works, Feed-water tubes, Food preparation equipment, Food processing equipment, Heat exchanger tubes, Hypodermic needles, Ladders, Mechanical & structural components, Pharmaceutical processing equipment, Piping systems, Railings, Street (urban) furniture, Textile tubing, Traffic barriers, Water pipes.
TP316H	Similar oxidation resistance to TP 316. Main areas of application: Heat exchangers, furnaces, chemical and petrochemical plant.
TP321	Heat exchanger tubing, Chemical processing tubing, Pressure tank tubing. Suitable for heat resisting applications to 800°C.
TP321H	This is the high carbon version of TP 321 which ensures greater creep resistance. Behaves much the same as TP 321 in oxidation resistance. Main applications: Heat exchangers, furnaces, boilers in chemical and petrochemical plant
TP316Ti	A titanium stabilized version of 316 used where good resistance to intergranular corrosion and high temperature strength is required.
TP317	Chemical processing tubing, Dyeing equipment, Ink manufacturing equipment, Pulp & paper manufacturing equipment
TP347HFG	Mainly used for boilers in the termal power plant, reheaters and superheaters

Super-Austenitic steel

TP904L

High resistance to general corrosion in e.g. sulphuric and acetic acids, crevice corrosion, stress corrosion cracking, pitting in chloride bearing solutions.
 

Ferritic and Martensitic Steel

TP405	Used for applications where hardening upon cooling from high temperatures must be avoided. Has excellent long-time stability up to 1200°F.
TP410	General purpose grade for use in mildly corrosive environments
TP430	Mechanical & structural tubing, Architectural tubing, Heat exchanger tubing, Condensers, Re-heaters, Evaporators.

Duplex

S31803	Typically used in heat exchangers, gas scrubbers, fans, chemical tanks, flowlines, marine and refinery applications.
S32750	Used in oil & gas, chemical process, power industries. At that heat-exchangers are main application.
S31254	With high levels of chromium, molybdenum, and nitrogen is especially suited for high-chloride environments such as brackish water, seawater and other high-chloride process streams.

Value-added services
BEVELING
Beveling Stainless Steel tubes contain one end angled,  so that it mates with a complementary tube end. Tubes can be beveled for certain applications in order to make welding of stainless steel tubes easier, which saves weld prep time and money compared to hand cutting.

HEAT TREATING & ANNEALING
Permanent Steel can heat treat some 400 series stainless steel seamless tube. Heat treating realizes stress as a result of hardening, depending upon the chemistry of the metal being treated. Heat treating is also used for tempering, quenching, normalizing, and solution annealing.

HONING & TURNING
During the honing/turning process, an abrasive rotating tool removes metal from the interior surface of a cylinder, pipe, or tube. The main purpose of honing is to finish the surface to a particular diameter and/or desired cylindrical geometric design. Honing is typically a secondary machining operation that completes a produce/part,  relieves stress created during production, or corrects features of the finished product. A typical production cycle is to drill, ream, heat treat, then hone.

POLISHING
POSITIVE MATERIAL IDENTIFICATION (PMI)
In some cases, it may be necessary to complete additional positive material identification testing. Permanent Steel can complete this testing in house or we can work with an independent laboratory to complete the testing. Please contact us for specific requirements.

UT TESTING
Ultrasonic Testing (UT) utilizes sound energy at high frequencies, in order to provide examinations and measurements of the stainless steel product. This aids in flaw detection/evaluation, dimensional measurements, etc.

B:Stainless steel welded pipe:
Sizes & Schedule Specifications
Size Range: 2" - 48"
Schedules: 5S, 10S, STD, XS, 40, 80, 100, 120, 160, XXS
Products: Stainless steel welded pipe, stainless steel erw pipe, stainless steel efw pipe

Grades of Stainless Steel Tube
Austenitic: 201, 304/304L, 316/316L, 317/317L, 347/347H, 321/321H, 904L
Ferritic: 409, 430, 439, 441, 434, 436, 444, 446
Martensitic: 403, 410, 410S, 414/L, 441, 418, 420, 440, 416

Duplex: 2205/S31803, S32750, S32760
 

Manufacturing process:

Stainless steel welded tube is a steel pipe made of steel plate or strip steel that is crimped and formed by a unit and a mold. The production process of welded steel pipe is simple, the production efficiency is high, the variety and specification are many, and the equipment investment is small, but the general strength is lower than that of seamless steel pipe.

Processing for Stainless Steel Welded Pipe

Bar & Structural Cutting	Products cut include Round Bar, Flat bar, Hex bar, Square bar, Tubing and Hollow Bar,  Pipe, Angles, channels, Beams and Tees.  Thickness range is 1/16″ to 28″diameter
Production Cutting	Stainless can provide production cutting for product diameters up to 4″.
Pipe Threading	Available thru 2″ in Diameter/All schedules
Tubular Polishing	Products polished included all tubular products, with OD & ID polishing available, Round Bar,  Square Bar, Hex & Flat bar, Angles, Uneven Leg Angles, beams, and other shapes.

 

Welded Stainless Steel Pipe Tolerances

NPS Designator	Permissible Variations in Outside Diameter
	Over In.	Under In.
1/8 to 1-1/2, incl	1/64 (0.015)	1/32 (0.031)
Over 1-1/2 to 4, incl	1/32 (0.031)	1/32 (0.031)
Over 4 to 8, incl	1/16 (0.062)	1/32 (0.031)
Over 8 to 18, incl	3/23 (0.093)	1/32 (0.031)

 

Nominal Wall Thickness:

NPS Designator	Outside Diameter in.	Schedule 5S in.	Schedule 10S in.	Schedule 40S in.	Schedule 80S in.
1/4	0.540		0.065	0.088	0.119
3/8	0.675		0.065	0.091	0.126
1/2	0.840	0.065	0.083	0.109	0.147
3/4	1.050	0.065	0.083	0.113	0.154
1.0	1.315	0.065	0.109	0.133	0.179
1 1/4	1.660	0.065	0.109	0.140	0.191
1 1/2	1.900	0.065	0.109	0.145	0.200
2	2.375	0.065	0.109	0.154	0.218
2 1/2	2.875	0.083	0.120	0.203	0.276
3	3.500	0.083	0.120	0.216	0.300
3 1/2	4.000	0.083	0.120	0.226	0.318
4	4.500	0.083	0.120	0.237	0.337
5	5.563	0.109	0.134	0.258	0.375
6	6.625	0.109	0.134	0.280	0.432
8	8.625	0.109	0.148	0.322	0.500
10	10.750	0.134	0.165	0.365	0.500
12	12.750	0.156	0.180	0.375	0.500

C:Stainless steel decorative pipe:

ITEMS	Stainless steel decorative pipe
	Stainless welded pipe(round)	Stainless square pipe	Stainless rectangle pipe	Stainless oval pipe
OD range	3-219MM	10MM*10MM--100MM*100MM	20*10MM--100*200MM	5*48MM 38*15MM 39.8*20.8MM 44*16MM etc..
WT range	0.12-4MM	0.16-4MM	0.16-4MM	0.23-4MM
Length range	Normal length 3-6M,but can be custom-made as requirements.
Grade	304/301/201/202/316/430/410/420/409etc.
Surface treatment	Matte(usually used as industrial pipe)/Mirror finish(decoration pipe)

D:Stainless slotted tubes::

Johnson screen/ore screen mesh	Grade:201/202/205/304/316/321 etc... Shape:Cylindric,flake Cylinder Diameter:29-1000mm Slot size:0.5-1.0mm in usual, can be customized Filter type:from outside to inside Length:2.9m or5.8m in usual to fit the container End connection: Male/female threaded couplings, weld rings/plain beveled
Wire-wrapped screen/strainer	Grade:201/202/205/304/316/321 etc... Size:2-16inch Slot size:0.5-1.0mm in usual, can be customized Length:2.9m or5.8m in usual to fit the container End connection:Male/female threaded couplings, weld rings/plain beveled

E:Stainless steel coil:

Latest welded pipe project order:

Latest seamless pipe project order:

Permanent Steel Manufacturing Co.,Ltd has been committed to being a major supplier of quality kinds of carbon steel pipe, stainless steel tube, hollow section numerous types of piping equipments including Bend, Cap, Coupling, Elbow, Reducer, Stub End, Tee, Olet, Joint, Gasket, etc. 

The Products from Permanent Steel Manufacturing Co.,Ltd are supplied in accordance with appropriate International Standards as well as Customer Specifications in a large variety of steel grades and dimensions. Permanent Steel Manufacturing Co.,Ltd on a 250,000 m2 area and has three production units: Foundry, Rolling and Extrusion mills. Permanent Steel Manufacturing Co.,Ltd operates under strict quality, environmental, as well as health and safety management systems, in compliance with ISO 9001, ISO 14001 and OHSAS 18001 standards.  We have six spiral pipe production lines have introduced into the international advanced technique design andmanufacturing,each of them is outfitted with the whole set equipment from uncoiling to pipeindpection,packing and then Ex-work,includingun coiler, leve ling ma chine , fly welding machine ,plasma cutting machine,pipe endgrinding machine.hydrostatic testing machine,beveling machine,end expander, ultrasonic inspector for pipe body and weld seam,highlyclear X-ray image inspection system and so on.

Our stainless steel pipe factory:

2.Coating:
We have two advanced three-layer PE anticorrosive pipe production lines, which can carry out three-layer PE and FBE anticorrosion for steel pipe with diameter of 20mm to 1820mm, as
well as epoxy asphalt anticorrosion production line, steel-plastic composite pipe production line, internal and external plastic coating and plasticlining production line, and cement mortar production line for inner wall of steel pipe. The annual anticorrosion production capacity reaches 18 million square meters.  Since its establishment, the company has formed a good cooperative relationship with many domestic and foreign steel pipe manufacturers, gas companies and oil companies, and its sales network covers many countries.  


Our Certificate:

End Users:

FAQ

Q: How long is your delivery time? 

A: Depends on pipes size and quantity. 7-10 days for stocked steel pipe and 20-40 days for new productions according to quantity.bowl shape stainless steel smoking pipe screens

Q: Do you provide samples? Is it free or extra? 201 Stainless Steel Pipe used for Food and Chemical Industry
A: Yes,we could offer free steel pipe sample for your evaluation. stainless steel pipe fitting

Q: What is your terms of payment? steel pipe

A:  TT payment way, TT+LC, or  100%  sight LC and usance L/C for 30-120days,the specific payment should be addressed by further discussion.