Showing posts with label News. Show all posts
Showing posts with label News. Show all posts

Wednesday, August 3, 2022

Differences Between 316L Stainless Steel Pipe and 316 Stainless Steel Pipe

 316L stainless steel pipe is a pipe material widely used in construction engineering. The shape of the tube is an oblong hollow steel tube. Mechanical equipment, petrochemical equipment, medical equipment, food and light industry transmission pipelines or mechanical parts will use 316L stainless steel pipes, but many friends will confuse 316L with 316. The following is a brief introduction to the difference between 316L stainless steel pipe and 316 stainless steel pipe:



1. Differences in production costs
The main difference between 316 and 316L is the carbon content. 316L is less than 0.03% and 316 is less than 0.08%. In the austenitic stainless steel series, carbon is an element that easily causes intergranular corrosion. The lower the carbon content, the less the tendency for intergranular corrosion. Therefore, the corrosion resistance of 316L is stronger than 316, and the price is more expensive than 316L.

2. The difference in the strength of stainless steel tubes
The tensile strength of 316 stainless steel pipe is higher than that of 316L stainless steel pipe. The tensile strength of 316 stainless steel pipe is higher than 520MPa ~ (316L) stainless steel pipe. The tensile strength of 316 stainless steel pipe is only greater than 480Mpa. This is because carbon is a strong austenite forming element, which can significantly increase the strength of stainless steel pipes.

3. Differences in practical applications
The cost difference between 316L stainless steel and 316 stainless steel is not big. The corrosion resistance and weldability of 316L stainless steel are obviously better than ordinary 316 stainless steel. From the manufacturer's perspective, stainless steel factories are reluctant to produce because the demand for ordinary 316 stainless steel is very low. Therefore, the actual circulation in the market is basically low-carbon 316 L stainless steel. Generally, 316 stainless steel is rarely sold unless there is a specific demand.

4. Differences in welding
Carbon has a negative effect on the corrosion resistance of stainless steel pipes. Especially for stainless steels that need to be welded, the corrosion resistance of low-carbon 316L stainless steel after welding is lower than that of 316 stainless steel. 316L has good corrosion resistance, and the welding section of 316 stainless steel needs to be solution annealed after welding. If 316L stainless steel is used, solution annealing after welding is not required.

5. Difference in corrosion resistance
316L stainless steel pipe has stronger corrosion resistance and is suitable for strong corrosion areas such as seaside. In addition, 316 stainless steel pipe is not recommended to consider the previous conditions.

6. The difference in the scope of use
In most cases, 304 stainless steel pipe is sufficient to meet the application requirements. Due to the high price of 316L stainless steel pipe, from the perspective of material cost, the use of 316L stainless steel pipe is about 1.5 times that of 304 stainless steel pipe, so the amount of 316L steel pipe should be customized.

Tuesday, January 4, 2022

What is a flange

 

Flanges General

A flange is a method of connecting pipes, valves, pumps and other equipment to form a piping system. It also provides easy access for cleaning, inspection or modification. Flanges are usually welded or screwed. Flanged joints are made by bolting together two flanges with a gasket between them to provide a seal.

Types of Flanges

The most used flange types in Petro and chemical industry are:

  • Welding Neck Flange
  • Slip On Flange
  • Socket Weld Flange
  • Lap Joint Flange
  • Threaded Flange
  • Blind Flange

All types except the Lap Joint flange are provided with a raised flange face.

Special Flanges

Except the most used standard flanges, there are still a number of special flanges such as:

  • Orifice Flanges
  • Long Welding Neck Flanges
  • Weldoflange / Nipoflange
  • Expander Flange
  • Reducing Flange

 Image of most common flange types.

Materials for Flanges

Pipe flanges are manufactured in all the different materials like stainless steel, cast iron, aluminium, brass, bronze, plastic etc. but the most used material is forged carbon steel and have machined surfaces.

In addition, flanges, like fittings and pipes, for specific purposes sometimes internally equipped with layers of materials of a completely different quality as the flanges themselves, which are “lined flanges”.

The material of a flange, is basically set during the choice of the pipe, in most cases, a flange is of the same material as the pipe.

All flanges, discussed on this website fall under the ASME en ASTM standards, unless otherwise indicated. ASME B16.5 describes dimensions, dimensional tolerances etc. and ASTM the different material qualities.

Dimensions of Flanges

Each flange ASME B16.5 has a number of standard dimensions. If a draftsman in Japan or a work preparer in Canada or a pipefitter in Australia is speaking about a Welding Neck flange 6″-150#-S40 ASME B16.5, then it goes over the flange which in the image here on the left is shown.

If the flange is ordered, the supplier want to know the material quality. For example ASTM A105 is a forged carbon steel flange, while A182 is a forged stainless steel flange.

So, in a correct order to a supplier two standards must be specified:
Welding Neck flange 6″-150#-S40-ASME B16.5 / ASTM A105.

Bolted Flange connections

A bolted flange connection is a complex combination of many factors (Flange, Bolts, Process, Temperature, Pressure, Medium).
All these various elements are interrelated and depend upon one another to achieve a successful result.
The reliability of the flanged joint depends critically upon competent control of the joint making process.

 a typical bolted flange connection.

The industry has recognized the critical nature of installation and assembly for several years.
In Europe, the emphasis has been on ensuring that joint making is undertaken by trained and validated technicians and this has led to the publication of a European Technical standard: TS EN 1591 Part 4 entitled “Flanges and their joints. Design rules for gasketed circular flange connections. Qualification of personnel competency in the assembly of bolted joints fitted to equipment subject to the Pressure Equipment Directive (PED)”.

The standard provides a methodology for the training and assessment of technicians involved in the making and breaking of flange joints and can be viewed as being analogous to the training required for welders involved with pressure vessel work. Its publication demonstrates the importance placed upon the competent control of joint making process in ensuring leak-free performance from the flange.

The gasket is but one of many reasons a bolted flange joint connection can leak.
Even when all the complex inter-related components of a bolted joint flange connection work in perfect harmony, the single most important factor leading to success or failure of that bolted flange connection will be attention given to properinstallation and assembly procedures by the person installing the gasket. If done properly, the assembly will remain leak-free for the target life expectancy.

 

Flanged connections versus Welded connections

There are no standards that define whether or not flange connections may be used.

In a newly built factory is customary to minimize flange connections, because only one weld is needed to connect two pieces of pipe. This saves the costs of two flanges, the gasket, the Stud Bolts, the second weld, the cost of NDT for the second weld, etc..

Some other disadvantages of flange connections:

  • Each flange connection can leak (some people claim that a flange connection is never 100 percent leak proof).
  • Flanged pipe systems need much more space (just think of a pipe rack).
  • Insulation of flanged pipe systems is more expensive (special flange caps).

Of course, flange connections have great benefits; some examples:

  • A new line can contain multiple pipe spools and can be manufactured in a workshop.
  • This pipe spools can be assembled in the plant without the need to be welded.
  • NDO (X-ray, Hydro test etc.) in the plant is not necessary, because this has been done in the workshop.
  • Blasting and painting in the plant is not necessary, because even this has been done in a workshop
    (only paint damages during installation should be repaired).

 

Knowledge About Buttweld Fittings

 

Buttweld Fittings general

A pipe fitting is defined as a part used in a piping system, for changing direction, branching or for change of pipe diameter, and which is mechanically joined to the system. There are many different types of fittings and they are the same in all sizes and schedules as the pipe.
Fittings are pided into three groups:

  • Buttweld (BW) fittings whose dimensions, dimensional tolerances et cetera are defined in the ASME B16.9 standards. Light-weight corrosion resistant fittings are made to MSS SP43.
  • Socket Weld (SW) fittings Class 3000, 6000, 9000 are defined in the ASME B16.11 standards.
  • Threaded (THD) fittings Class 2000, 3000, 6000 are defined in the ASME B16.11 standards.
  Most used buttweld fittings.

1. Elbow 90° long radius   2. Elbow 45°   3. Elbow 90° short radius
4. Elbow 180° long radius   5. Elbow 180° short radius
6. Tee straight   7. Tee reducing
8. Reducer concentric   9. Reducer eccentric
10. End cap   11. Lap joint Stub End

Applications of Buttweld Fittings

A piping system using buttweld fittings has many inherent advantages over other forms.

  • Welding a fitting to the pipe means it is permanently leakproof
  • The continuous metal structure formed between pipe and fitting adds strength to the system
  • Smooth inner surface and gradual directional changes reduce pressure losses and turbulence
    and minimize the action of corrosion and erosion
  • A welded system utilizes a minimum of space

Bevelled Ends

The ends of all buttweld fittings are bevelled, exceeding wall thickness 4 mm for austenitic stainless steel, or 5 mm for ferritic stainless steel. The shape of the bevel depending upon the actual wall thickness. This bevelled ends are needed to be able to make a “Butt weld”.

 Typical bevel types.

ASME B16.25 covers the preparation of buttwelding ends of piping components to be joined into a piping system by welding. It includes requirements for welding bevels, for external and internal shaping of heavy-wall components, and for preparation of internal ends (including dimensions and dimensional tolerances). These weld edge preparation requirements are also incorporated into the ASME standards (e.g., B16.9, B16.5, B16.34).

Material and Performance

The most common materials used in fittings produced is carbon steel, stainless steel, cast iron, aluminium, copper, glass, rubber, the various types of plastics, etc..

In addition, fittings, like pipes, for specific purposes sometimes internally equipped with layers of materials of a completely different quality as the fitting themselves, which are “lined fittings”.

The material of a fitting is basically set during the choice of the pipe, in most cases, a fitting is of the same material as the pipe.

 

Knowledge About Steel Elbow

 

Elbows 45° – 90° – 180° LR/SR

The function of a elbow is to change direction or flow in a piping system. By default, there are 5 opportunities, the 45°, 90° and 180° elbows, all three in the “long radius” version, and in addition the 90° and 180° elbows both in the “short radius” version.

Long and Short Radius

Elbows are split into two groups which define the distance over which they change direction; the center line of one end to the opposite face. This is known as the “center to face” distance and is equivalent to the radius through which the elbow is bent.
The center to face distance for a “long” radius elbow, abbreviated LR always is “1? x Nominal Pipe Size (NPS) (1?D)”, while the center to face distance for a “short” radius elbow, abbreviated SR even is to nominal pipe size.

Here below, for example, you will find the center to face distance of four 2 inch elbows, (the “A” distance on the image).

1.   90°- 2″- LR : = 1? x (25,4 x 2)   A = 76,2 mm

2.   180°- 2″- LR : = 1? x (25,4 x 2) x 2   A = 152,4 mm

3.   90°- 2″- SR : = 25,4 x 2   A = 50,8 mm

4.   180°- 2″- SR : = (25,4 x 2) x 2   A = 101,6 mm

Bw Elbows

45° Elbow

The function of a 45° elbow is the same as a 90° elbow, but the measurement of dimensions is different to that of the 90° elbow.

Elbow 45

 45° buttweld elbow.

 

The radius of a 45° elbow is the same as the radius of the 90° LR (1?D). However, the center to face dimension is not equivalent to the radius as in 90° LR elbows. This is measured from each face to the point of intersection of the center lines perpendicular to each other, distances B on the image. This is due to the smaller degree of bend. Short radius 45° elbows are not available.

Standards

The most applied version is the 90° long radius and the 45° elbow, while the 90° short radius elbow is applied if there is too little space. The function of a 180° elbow is to change direction of flow through 180°. Both, the LR and the SR types have a center to center dimension double the matching 90° elbows. These fittings will generally be used in furnesses or other heating or cooling units.

In addition to the defined elbows, there is the Reducing Elbow, which is a elbow with various diameters on the ends. Because this elbow, for many suppliers it is not a standard item, and thus probably a high price with a long delivery time, the use of a “normal” elbow with a separate reducer is an option if the situation allows.

Elbow Red

 buttweld reducing elbow.

 

Other degrees elbows can be machined from a standard elbow. Longer radius type, the center to face dimension e.g. is three times the nominal size (3D), even is available.

Dimensions, dimensional tolerances etc. for long and short radius elbows are defined in ASME B16.9.

Wall Thickness of Elbows

The weakest point on an elbow is the inside radius. ASME B16.9 only standardizes the center to face dimensions and some “squareness” dimensional tolerances. The wall thickness at the weld line location even is standardized, but not through the rest of an elbow. The standard states that the minimum tolerance will be within 12.5% of the minimum ordered wall thickness of the pipe. A maximum tolerance is specified only at the ends of the fitting.

Many providers of buttweld elbows (and tees) provide one schedule greater thickness so that sufficient wall thickness, after forming, remains.

List of Chemical Elements

List  of  Chemical  Elements

Atomic NoName of
element
Chemical
symbol
Origin of name
89ActiniumAcFrom the Greek word aktinos (ray)
13AluminiumAlFrom the Latin word alumen (alum)
95AmericiumAmFrom America where it was discovered
51AntimonySbFrom the Greek words anti + monos meaning not alone
18ArgonArFrom the Greek word argos meaning inactive
33ArsenicAsFrom the Greek word arsenikon meaning yellow orpiment (orpiment is arsenic trisulphide)
85AstatineAtFrom the Greek word astatos meaning unstable
56BariumBaFrom the Greek word barus meaning heavy
97BerkeliumBkNamed after Berkeley, USA where it was discovered
4BerylliumBeFrom the Greek word beryllos meaning beryl
83BismuthBiFrom the German word bisemutum
107BohriumBhNamed after Niels Bohr, the Danish physicist
5BoronBFrom the Arabic word buraq or the Persian word burah
35BromineBrFrom the Greek word bromos meaning stench
48CadmiumCdFrom the Latin word cadmia or Greek word kadmeia both meaning calamine
55CaesiumCsFrom the Latin word caesius meaning sky blue
20CalciumCaFrom the Latin word calx meaning lime
96CaliforniumCfNamed after the University of California, USA where it was discovered
6CarbonCFrom the Latin word carbo meaning charcoal
58CeriumCeNamed after the Asteroid Ceres, which had been discovered in 1801, two years before the element
17ChlorineClFrom the Greek word chloros meaning pale green
24ChromiumCrFrom the Greek word chrome meaning colour
27CobaltCoFrom the German word kobald meaning goblin or evilspirit
29CopperCuFrom cuprum, the Latin name for the island of Cyprus
96CuriumCmNamed after Pierre & Marie Curie
110DarmstadiumDsNamed after Darmstadt, Germany where it was discovered
105DubniumDbNamed after Dubnia, USSR where it was discovered
66DysprosiumDyFrom the Greek word dysprositos meaning hard to obtain
99EinsteiniumEsNamed after Albert Einstein
68ErbiumErNamed after the village of Ytterby in Sweden, where the mineral from which it was extracted came from
63EuropiumEuNamed after Europe
100FermiumFmNamed after Enrico Fermi, the Italian physicist
9FluorineFFrom the Latin word fluere meaning to flow
87FranciumFrNamed after France
64GadoliniumGdNamed after Johan Gadolin, the Finnish chemist and mineralogist
31GalliumGaFrom the Latin word Gallia meaning France
32GermaniumGeFrom the Latin word Germania meaning Germany
79GoldAuFrom the German word gold, which was itself derived from an earlier word meaning yellow
72HafniumHfFrom the Latin word Hafnia meaning Copenhagen
108HassiumHsFrom the Latin word Hassium, for the German State of Hess
2HeliumHeFrom the Greek word helios meaning sun
67HolmiumHoFrom the Greek word Holmia meaning Sweden
1HydrogenHFrom the Greek words hydro genes meaning water and generator
49IndiumInNamed after the indigo line in its atomic spectrum
53IodineIFrom the Greek word iodes meaning violet
77IridiumIrFrom the Greek word iris meaning rainbow
26IronFeFrom isarn the old Saxon word for iron
36KryptonKrFrom the Greek word kryptos meaning hidden
57LanthanumLaFrom the Greek word lanthanein meaning to lie hidden
103LawrenciumLrNamed after Ernest O. Lawrence, the inventor of the cyclotron
82LeadPbFrom the Anglo-Saxon word lead
3LithiumLiFrom the Greek word lithos meaning stone
71LutetiumLuFrom the Greek word Lutetia meaning Paris
12MagnesiumMgFrom the Greek word Magnesia, a district of Thessaly
25ManganeseMnFrom the Latin word magnes meaning magnet
108MeitneriumMtNamed after Lise Meitner, the Austrian physicist
101MendeleviumMdNamed after Dimitri Mendeleev, the Russian chemist
80MercuryHgNamed after the planet Mercury
42MolybdenumMoFrom the Greek word molybdos meaning lead
60NeodymiumNdFrom the Greek words neos didymos meaning new twin
10NeonNeFrom the Greek word neon meaning new
93NeptuniumNpNamed after the planet Neptune
28NickelNiFrom the German word kupfernickel meaning devil’s scopper
41NiobiumNbNamed after Niobe, the daughter of Tantalus in Greek mythology
7NitrogenNFrom the Greek words nitron genes meaning nitre and forming
102NobeliumNoNamed after Alfred Nobel, the Swedish chemist
76OsmiumOsFrom the Greek word osme meaning smell
8OxygenOFrom the Greek words oxy genes meaning acid and forming
46PalladiumPdNamed after the asteroid pallas which was discovered at about the same time. Derived from Pallas Athene, the Greek goddess of wisdom
15PhosphorusPFrom the Greek word phospheros meaning bringer of light
78PlatinumPtFrom the Spanish word platina meaning silver
94PlutoniumPuNamed after the planet Pluto
84PoloniumPoNamed after Poland, birthplace of Marie Curie
19PotassiumKFrom the English word potash, the ashes remaining in the pot after plant leaves were burnt and from which potassium carbonate was obtained
59PraseodymiumPrFrom the Greek words prasios didymos meaning greentwin
61PromethiumPmNamed after Prometheus, who stole fire from heaven and gave it to humans, according to Greek mythology
91ProtactiniumPaFrom the Greek word protos meaning first
86RadonRnNamed after the element radium, from which it was derived
88RadiumRaFrom the Latin word radius meaning ray
75RheniumReFrom Rhenus, the Latin for river Rhine, where one of the discoverers was born
45RhodiumRhFrom the Greek word rhodon meaning rose
111RoentgeniumRgNamed after Wilhelm C. Roentgen, the German physicist
37RubidiumRbFrom the Latin word rubidius meaning dark red
44RutheniumRuFrom Ruthenia, the Latin word for Russia
104RutherfordiumRfNamed after Ernest R. Rutherford, the New Zealand physicist and chemist
62SamariumSmNamed after samarskite the mineral from which it was isolated
21ScandiumScFrom the Latin word Scandia meaning Scandinavia
106SeaborgiumSgNamed after Glen T. Seaborg, the American nuclear chemist
34SeleniumSeFrom the Greek word selene meaning moon
14SiliconSiFrom the Latin word silicis meaning flint
47SilverAgFrom siluvar, the Old Saxon word for silver
11SodiumNaFrom soda, the English word for sodium carbonate
38StrontiumSrNamed after Strontian, Scotland where the mineral from which it was isolated was found
16SulphurSFrom sulphurium, the Latin word for sulphur
73TantalumTaNamed after King Tantalus, the father of Niobe in Greek mythology
43TechnetiumTcFrom the Greek word technikos meaning artificial
52TelluriumTeFrom the Latin word tellus meaning earth
65TerbiumTbNamed after Ytterby a town in Sweden where its ore was found
81ThalliumTlFrom the Greek word thallos meaning green twig
90ThoriumThNamed after Thor, the Scandinavian God of war
69ThuliumTmNamed after Thule the ancient name for Scandinavia
50TinSnFrom the Anglo-Saxon word tin
22TitaniumTiNamed after the Titans, the elder gods who ruled the earth before the Olympian gods, in Greek mythology
74TungstenWFrom the Swedish words tung sten meaning heavy stone
92UraniumUNamed after the planet Uranus
23VanadiumVNamed after Vanadis, the goddess of beauty in Scandinavian mythology
54XenonXeFrom the Greek word xenon meaning stranger
70YtterbiumYbNamed after the village of Ytterby in Sweden where its ore was found
39YttriumYNamed after the village of Ytterby in Sweden where its ore was found
30ZincZnFrom the German word zink
40ZirconiumZrFrom the Arabic word zargun meaning goldcolour
Atomic NoName of
element
Chemical
symbol
Origin of name

B16.36-2006 ORIFICE FLANGES

B16.36-2006 ORIFICE FLANGES

ASME B16.36-2006 ORIFICE FLANGES

CLASS 300

CLASS 600

CLASS 900

CLASS 1500

CLASS 2500

NOMINAL

PIPE SIZE

THICKNESS

MIN

LENGTH

THRU

HUB

W/NECK

THICKNESS

MIN

LENGTH

THRU

HUB

W/NECK

THICKNESS

MIN

LENGTH

THRU

HUB

W/NECK

THICKNESS

MIN

LENGTH

THRU

HUB

W/NECK

THICKNESS

MIN

LENGTH

THRU

HUB

W/NECK

NOMINAL

PIPE SIZE

MM

INCH

T

LTB

T

LTB

T

LTB

T

LTB

T

LTB

MM

INCH

25

1

36.6

83

36.6

83

38.1

90

38.1

90

38.1

99

25

1

40

1 1/2

36.6

86

36.6

86

38.1

96

38.1

96

44.5

118

40

1 1/2

50

2

36.6

86

36.6

86

38.1

109

38.1

109

50.8

134

50

2

65

2 1/2

36.6

89

36.6

89

41.3

112

41.3

112

57.2

150

65

2 1/2

80

3

36.6

89

36.6

89

38.1

109

47.7

124

66.7

175

80

3

100

4

36.6

92

38.1

109

44.5

121

54

131

76.2

197

100

4

150

6

36.6

100

47.8

124

55.6

147

82.6

178

108

280

150

6

200

8

39.7

112

55.6

140

63.5

169

92.1

220

127

325

200

8

250

10

46.1

118

63.5

159

69.9

191

108

261

165.1

426

250

10

300

12

49.3

131

66.5

163

79.2

207

123.9

290

184

171

300

12

350

14

52.4

143

69.9

172

85.9

220

133.4

305

350

14

400

16

55.6

146

76.2

185

88.9

223

146.1

318

400

16

450

18

58.8

159

82.6

191

101.6

236

162

334

450

18

500

20

62

162

88.9

197

108

255

177.8

363

500

20

600

24

68.3

169

101.6

210

139.7

299

203.2

413

600

24

ASME Flange

Type:

Lap-Joint Flange(LJ),  Socket-welded Flange(SW),  Slip-on Flange(SO),  Welding-Neck Flange(WN),  Threaded Flange(TH),  Orifice Flange,  Blind Flange,  Long Welding Neck Flange,  Blank Flange,  Reducing Flange,  Spectacle Blind(Figure 8 Flange),  Special Flange,  Swivel Flange etc.

 

Manufacture Standard:

 ASME/ANSI B16.5, B16.47A/B, MSS SP-44,ISO7005-I,API605,GB9112~9124, BS1560-3.1

 

Material:

 

▶Stainless Steel:

ASTM A/SA182 F304, F304L,F316, F316L, 316Ti, F317L, F321,F321H,    F310H, F347H, N08904, F44 etc. 

(W1.4301, 1.4306, 1.4948, 1.4401, 1.4404, 1.4571, 1.4438, 1.4541, 1.4878, 1.4550, 1.4845, 1.4539, 1.4547 etc.).

 

▶Duplex&Super Duplex:

 ASTM A/SA182 F51, F53, F55, F59, F60(w1.4462, 1.4410, 1.4501, 1.4507 etc.)

 

▶Nickel Alloy:

 ASTM B564 N10276, N04400,N06600,N06601,N06625,N08800,N08020 (w2.4819,2.4360,2.4361,2.4816,2.4851,2.4856,1.4876,1.4958 ) etc.

 

▶Other Alloys:

 ASTM A105,A105N;  St37.2, C22.8;

 ASTM A182 F11, F12, F22, F5, F91;

 ASTM A350 LF2, LF3;

 ASTM A694 F42, F46, F48, F50, F52, F56,F60,F65,F70 etc.

 

Rate:

150LBS~2500LBS

 

Dimension:

1/2” to 60” (DN15 ~DN1500)

B16.36-2006 ORIFICE FLANGES

B16.47 – 2006 Class 150 Series A

B16.47- 2006 Ring Groove Class 300-900

ASME B-16.48 CLASS 150

ASME B-16.48 CLASS 300

ASME B-16.48 CLASS 600

ASME B-16.48 CLASS 900

ASME B-16.48 CLASS 1500

ASME B-16.48 CLASS 2500

ASME B 16.5-2003 CLASS 150

ASME B 16.5-2003 CLASS 300

ASME B 16.5-2003 CLASS 400

ASME B 16.5-2003 CLASS 600

ASME B 16.5-2003 CLASS 900

ASME B 16.5-2003 CLASS 1500

ASME B 16.5-2003 CLASS 2500

Tolerence of :ASME/ANSI B16.5-1996 and B16.47-1996

Duplex 2205

Duplex 2205 2022-01-05 Posted by Wilson Type Seamless & Welded Pipe Butt Weld Fittings Flanges & Pressure Fittings Sizes 1/4″ thru 16″ 1/2″ thru 12″ All descriptions Schedules Sch 10, 40, 80, 160 & XXH Sch 10, 40, 80, 160, & XXH ASTM Standards Bar Butt Weld Fittings Forgings Pipe, Welded & Seamless Tube, Welded Plate A276, A479 A815 A182 A790 A789 A240 Minimum Physical Properties Tensile Strength Yield Strength 90 KSI Min. 65 KSI Min. Chemical Composition (wt%) C Mn P S Si Ni Cr Fe Mo N 0.03 Max 2.00 Max 0.03 Max. 0.02 Max. 1.00 Max. 4.50 – 6.50 21.0 – 23.0 Balance 2.50 – 3.50 0.14 – 0.20 Properties Duplex 2205 is a dual-phase stainless steel whose grain structure is about 45% ferritic and 55% austenitic, hence the name “duplex”. With twice the mechanical strength and corrosion resistance of common austenitics, 2205 offers some advantages over 316L and 317L: * Lower coefficient of thermal expansion and a higher thermal conductivity * Resists chloride stress corrosion cracking * Pitting and crevice corrosion resistance * Excellent choice for high chloride environments * Lower cost than high alloyed austenitics Applications Industries taking advantage of the lower cost and higher mechanical properties of 2205 include: * Heat exchangers * Marine construction * Oil and gas industry * Chemical processing www.wilsonpipeline.com

904L

TypeSeamless & Welded PipeButt Weld FittingsFlanges & Pressure Fittings
Sizes1/4″ thru 16″1/2″ thru 12″All descriptions
SchedulesSch 10, 40, 80, 160, & XXHSch 10, 40, 80, 160, & XXH
ASTM Standards
BarButt Weld FittingsPipe, Welded & SeamlessTube, WeldedTube, SeamlessPlate
B649B366B677- smls; B673 – weldedB674B677B625
Minimum Physical Properties
Tensile StrengthYield StrengthElongation
71 KSI Min.31 KSI Min.35% Min.
Chemical Composition (wt%)
CMnPSSiNiCrFeMo
0.02 Max.2.00 Max0.045 Max.0.035 Max.1.00 Max.23.0 – 28.019.0 – 23.0Balance4.0 – 5.0

Properties

N08904 (904L) is a high alloy austenitic product intended for use under severely corrosive conditions. It offers good resistance to:

* Pitting and crevice corrosion
* Intergranular corrosion
* Stress corrosion cracking
* General corrosion

Applications

904L is used in the chemical industry to process many chemicals. Some examples are: Acetic acid, Acetylene, Acrylates, Acrylonitrile, Aluminum sulfate, Ammonium phosphate, Ammonium sulfate, Battery acid, Benzene, Butyl acetate, Caprolactum, Cellophane, Citric acid, Nitrophosphate, Oxalic acid, Superphosphate, Tall oil, Tartaric acid, Uranium oxide and Zinc sulfate.

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347/347H

TypeSeamless & Welded PipeButt Weld FittingsFlanges & Pressure Fittings
Sizes1/4″ thru 16″1/2″ thru 12″All descriptions
SchedulesSch 10, 40, 80, 160 & XXHSch 10, 40, 80, 160, & XXH
ASTM Standards
BarButt Weld FittingsForgingsPipe, Welded & SeamlessTube, WeldedTube, SeamlessPlate
A276, A479A403A182A312A249A213A240
Minimum Physical Properties
Tensile StrengthYield Strength
75 KSI Min.30 KSI Min.
Chemical Composition (wt%)
CMnPSSiNiCrFeTi
0.04 – 0.082.00 Max0.04 Max0.03 Max0.75 Max9.0 – 13.017.0 – 20.0Balance0.4 – 1.0

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