Stainless Welded Steel Pipe

Stainless Welded Steel Pipe

Product Details


Stainless steel pipe

Stainless steel steel pipe is a kind of hollow long circular steel,mainly widely used in petroleum,chemical,medical,food,light industry,mechanical instruments and other industrial delivery pipelines as well as mechanical structural components.In addition,when the bending and torsion strength is the same,the weight is lighter,so it is also widely used to manufacture mechanical parts and engineering structures.Also commonly used as furniture and kitchen utensils and so on.

1.Production process of seamless stainless steel pipe:

a.round steel preparation;

b.heating;

c.Hot rolling perforation;

d.cutting;

e.pickling;

f.grinding repair;

g.lubrication;

h.cold-rolling processing;

i.skim;

j.solid solution heat treatment;

k.straightening;

l.pipe cutting;

m.pickling;

n.finished product inspection.

2.Production process of stainless steel welding pipe:

Raw material--strip--welding pipe--repair end--polishing--inspection(spray printing)--packaging--shipping(into the warehouse)(decorative welding pipe).

Raw materials--strip--welding pipe--heat treatment----correction--straightening--repair-end--pickling--hydraulic test--inspection(spraying)-packaging--shipment(into the warehouse)(welding pipe industrial pipe).

Classification

Stainless steel pipes are divided into ordinary carbon steel pipe,high quality carbon structure steel pipe,alloy structure pipe,alloy steel pipe,bearing steel pipe,stainless steel pipe,double metal composite pipe,coating and coating pipe to save valuable metals and meet special requirements.Various kinds of stainless steel pipes,different uses,different technical requirements and different production methods.Outer diameter of current production steel pipe range 0.1-4500mm,wall thickness range 0.01~250mm.

Production mode

Stainless steel pipe is divided into seamless pipe and welding pipe,seamless steel pipe can be divided into hot rolled pipe,cold rolled pipe,cold pulled pipe and extrusion pipe,cold pulled,cold rolling is the secondary processing of steel pipe;welding pipe is divided into straight welded pipe and spiral welding pipe.

Standard Classification

4-1 Classification:

①National Standard GB②Industry Standard YB③Local Standard Enterprise Standard Q/CB

4-2 Classification:

①Product Standard Packaging Standard Method Standard Basic Standard

4-3 Standard level(in three levels):

Level Y:International Advanced Level I:International General Level Level H:Domestic Advanced Level

4-4 National standard:

GB1220-84 stainless rod(I)GB4241-84(H)

GB4356-84 stainless welding welding Park(I)GB1270-80 stainless pipe(I)

GB12771-91 stainless welded pipe(Y)GB3280-84 stainless cold plate(I)

GB4237-84 stainless Hot Plate(Class I)GB4239-91 stainless Cold strip(Class I)

Specification sheet

Stainless steel pipe specification table
SpecificationSpecificationSpecification
6-12×1.5-2.573×4-4.5-5-6-7-8-9-10-12-15219×30-40
14×1.5-2.5-376×4-4.5-5-6-7-8-9-10-12-14245×8-10-14-17-20-22
16×1.5-2.5-483×4.5-5-10245×25-28-30-34-40
18×2.3-4-589×4.5-8-10273×7-9-12-15-18-20-25
20×2.5-3-595×4.5-6-8273×30-35-38-40
24×2.5-3-4-5-6102×4.5-5-6-10-12-14-16-20299×8-12-16-20-24-28
25×2.5-3-4-5-6108×4.5-5-14-18-20-22299×30-32-36-38-40
28×3-3.5-4-5-6114×4.5-5-6-7-8-10-12-14-18-20325×8-12-14-18-38
32×3.5-4-5-6-8121×4.5-5-6-7-8-10-12-14-16-20325×28-32-34-38
34×4-5-6-8127×4.5-5-6-7-8-10-12-14-16-20351×10-16-20-25-40
36×3.5-5-6-8133×4.5-6-8-12-14-16-18-20-25-30355×6-18-20-25-30-40
38×4-5-6-7-8-9-10140×5-6-7-8-9377×8-12-15-20-24-28
39×3.5-5-8-10146×4.5-6-8377×30-37-40
42×3.5-4-5-6-7-8-9-10152×4.5-6-402×10-20-25-30-35
45×3.5-4-5-6-7-8-9159×4.5-6-10-12-14406×10
48×3.5-4-5-6-7-8-9-10159×16-18426×10
51×3.5-4-5-6-7-8-9-10168×8-25-30-35450×10-20-25-34-40
56×3.5-4-5-6-7-8-9-10180×8-12-16-25-30480×25-30-40
57×3.5-5-6-7-8-9-10-12180×32-34-38-40500×10-34-40-45
60×3.5-4.5-5-6-7-8-9-12-14194×6-8-25-30-40510×10-25-34-40-45
63×3.5-4.5-5-6-7-8-9-10-12-14203×6-7-10-15-20-25-30530×20-30-40
68×4-4.5-5-6-7-8-9-10-12-14-16203×32-36-40560-720*6-10-24-45
70×4-4.5-5-6-7-8-9-10-12-15-16219×6-8-12-16-18-20-25

Dimension and allowable deviation of steel pipe

Deviation gradeAllowable deviation of the outer diameter
D1±1.5%，MIN±0.75 mm
D2±1.0%。MIN±0.50 mm
D3±0.75%．MIN±0.30 mm
D4±0.50%。MIN±0.10 mm

Weight calculation

Hydraulic pressure formula for hydraulic test of stainless steel welding pipe for fluid (GB/T1277-2008):

P=2RS/D

Medium formula: P-test pressure, MPa;

R-stress, 50%, MPa;

Nominal wall thickness of S-steel pipe, mm;

Nominal outer diameter of the D-steel pipe, mm.

W= × wall thickness × 0.02491=KG/M(per m).

Stainless steel pipe execution standard

Stainless steel seamless steel pipe for GB/T14976-2012 fluid delivery

(For GB/T14976-2002 over GB/T14976-1994 for GB2270-1980)

Stainless steel seamless steel pipe for GB/T14975-2012 construction (replace GB/T14975-2002)

GB13296-2013 stainless steel pipe for GB13296-2013 boiler pipe, heat exchanger

(GJB2608-96) (YB 676-73) Structural pipe for aviation, thick wall seamless steel pipe

(GJB2296-95) (YB 678-71) Stainless steel pipe for aviation

(YB/T679-97) (YB 679-71) 18A hollow rivevet sheet wall seamless steel pipe for aviation

(GJB2609-96) (YB 680-71) Structural pipe for aviation, thin-wall seamless steel pipe

(YB/T681-97) (YB 681-71) Air duct 20A thin-wall seamless steel pipe

GB3090-2000 small diameter stainless steel steel pipe

Seamless steel pipe for GB5310-2017 high-pressure boiler

GB3087-2008 Low and medium pressure boiler pipe

GB3089-2008 nonrust resistant acid extremely thin-wall seamless steel pipe

GB9948-2013 seamless steel for petroleum cracking

Ferriite and austenitic alloy tubes for ASTM A213 boiler, heat exchanger

ASTM A269 General purpose Austenitic stainless steel pipe and welding pipe

ASTM A312 austenitic stainless steel seamless steel pipe welded steel pipe welding pipe

General Requirements for ASTM A450 Carbon Steel, Ferriite and Austenitic Alloy Steel Pipe

General requirements for ASTM A530 specialized ferrosteel and alloy steel

ASTM A789 generally requires carbon body austenitic stainless steel seamless steel pipes and welded steel pipes

JIS G3456-88 stainless steel pipe for mechanical structure

JIS G3448-88 stainless steel pipe for ordinary pipes

Stainless steel pipe for JIS G3459-88 pipes

The stainless steel pipe for the JIS G3463-88 boiler, heat exchanger

Q/HYAD seamless steel pipe for chemical industry

(0Cr18NI11T) Q / HYAD Cr 18 Ni 5 MO 3 Si 2 Dual-phase Stainless Steel seamless steel pipe.

Application Requirements

Automotive industry

Petrochemical industry includes the chemical fertilizer industry

Fluid delivery like water and gas

Equipment manufacturing and Repair

Material Classification

Stainless steel pipes can be divided into Cr series (400 series), Cr-Ni series (300 series), Cr-Mn-Ni(200 series), and the outlet hardening series (600 series).

200 Series-Chromium-Ni-Manganese austenitic Stainless Steel 300 Series-Chromium-Nickel austenitic stainless steel.

301- - - - - - - - - -Good ductility for molding products. It can also be hardened quickly by machining. Good welability. Wear resistance and fatigue strength are better than 304 stainless steel.

302- -corrosion resistance is the same as 304, with better strength due to relatively high carbon content.

303- - - - - - - - - - -by adding a small amount of sulfur, phosphorus makes it easier to cut than 304.

304- - -18 / 8 stainless steel. The GB number 0Cr18Ni9. 309— has better temperature resistance than the 304.

316-Following 304, the second most widely used steel species is mainly used in the food industry, pharmaceutical industry and surgical equipment, adding molybdenum to obtain a special corrosion-resistant structure. Marine steel is also used for its better chloride corrosion resistance than the 304 stainless steel pipe. The SS316 is commonly used for nuclear fuel recovery devices. Class 18 / 10 stainless steel tubes also meet this application level.

Model 321-Similar performance to 304 except for reducing the risk of material weld corrosion with titanium addition.

Series 400-Ferriite and Martenite stainless steel.

408-Good heat resistance, weak corrosion resistance, Ni. of 11% Cr,8%

409-The cheapest model (British American), usually used as a car exhaust pipe, is ferrite stainless steel (chrome steel).

410-Martenite (high strength chromium steel), with good wear resistance and poor corrosion resistance.

416-Adding sulfur improves the processing performance of the material.

420- "Blade Class" Marstenite steel, similar to the earliest stainless steel of cloth high chromium steel. Also used for surgical knives, which can be done very bright.

430-Ferrite stainless steel, for decorative use, for example, for automotive accessories. Good formability, but with poor temperature resistance and corrosion resistance.

440-High strength blade steel, with slightly higher carbon content, achieves high yield strength and a hardness of 58HRC,, which is among the hardest stainless steel. The most common example of the application is the "razor blades". There are three common models: 440A,440B,440C, and 440F(machining).

Series 500-Heat-resistant chromium alloy steel.

Series 600-Marstenite precipitation hardened stainless steel pipe.

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