Products

supply of AISI 316/316L stainless steel products

Our main supplied material is stainless steel AISI 316/316L; nevertheless, we can also supply other materials, on request (such as Hastelloy C276, Inconel 625, Monel 400, 6MO, Duplex (F51 F55, Incoloy, etc.).

General characteristics of the tubes supplied

Tecra is specialized in the trade of tubes for instrumentation and piping.

Depending on the circumstances, tubes can be supplied in rods of 5/7 meters commercial length and/or of 6 meters fixed length or, in alternative, also in coils with standard length of 100/110 m and linger length (on request).

On customers demand, Tecra also provides a service of cutting tubes to measure so that they will be easier to be moved.

In the packaging phase, rods are jointed together to create a bundle of different dimensions depending on the quantity ordered or, in alternative, they are put within a fumigated wooden case.

In case of tubes in coils, they are packaged on pallets, wrapped in cellophane not giving them the possibility to move and strapped.

On request, we also provide plastic free packaging in a green and environmental sustainability perspective.

For what concerns the tubes in rods, the raw material origin is Italian or Euroepan, but also non-EU, only on request.

On the other hand, with reference to tubes in coils, the origin of seamless tubes is non-EU, while that of welded ones is Italian or European.

When designing an industrial plant, designers pay particular attention to the choice of tubes that will be used to create the plant itself. The choice will be done according to the legislation and guidelines in force in the area and/or country where the plant will be build and considering many variables on the basis of the purpose for which the plant must be realized.
The main legislation to follow are ASME (American Society of Mechanical Engineers) and ANSI (American National Standards Institute).
Furthermore, in order to choose the most adequate tube, the following aspects must to be considered: pressure, temperature and kind of substance that flows inside. Once considering these factors, it is important to properly identify the most suitable material, tube thickness and the dimensions of both the internal and external diameter.

In the end, to be sure that the tube will withstand the pressure and the temperature avoiding system failure with damaging consequences to the system itself and even to workers health, it is fundamental to select the correct thickness.

STAINLESS STEEL AND SPECIAL MATERIAL

Come and discover our range of stainless steel and special materials products.

NICKEL ALLOY TUBES

Come and discover our range of nickel alloy tubes : Alloy 625, Alloy 825, Hastelloy, Monel.

COPPER-NICKEL PIPES

Come and discover our range of copper-nickel pipes in rods.

TITANIUM TUBES

Come and discover our range of titanium tubes.

CONDUIT TUBES (GALVANIZED STEEL)

Come and discover our range of conduit tubes (galvanized steel).

TUBES ACCORDING TO BWG STANDARDS

Come and discover the tubes according to BWG Standards that we can offer

COPPER TUBES

Come and discover the copper tubes that we can offer

DEKABON TUBES

Come and discover the Dekabon tubes that we can offer

CLAMPS FOR TUBES

Come and discover the clamps that we can offer

FITTINGS

Tecra has a wide variety of fittings: twin ferrules compression fittings; forged fittings.

PRODUCTION STANDARD

Welded Tubes

ASTM A249, 269, 312, A789, EN 10217-7 and equivalent in ASME, DIN NFA, etc.

Seamless Tubes

ASTM A249, 269, 312, A789, A790, EN 10216-5 and equivalent in ASME, DIN NFA, etc.

STEEL GRADE AND CLASSES

AUSTENOFERRITIC STEEL/DUPLEX AND SUPERDUPLEX

Steel Grade and Chemical composition

Gradi degli acciai austenitici/composizione chimica %
ASTMDIN ENUNSC
≤ %
MN
≤ %
SI
≤ %
P
≤ %
S
≤ %
CR
%
NI
%
MO
%
TI
≤ %
TP 30414.301S304000,082,000,750,0450,03018,00-20,008,00-11,00
TP 304L14.306S304030,302,001,000,0450,01518,00-20,008,00-11,00
TP 304L14.307S304030,352,000,750,0450,03018,00-20,008,00-12,00
TP 31614.401S316000,082,000,750,0450,03016,00-18,0011,00-14,002,00-3,00
TP 316L14.404S316030,302,001,000,0450,01516,50-18,5010,00-13,002,00-2,50
TP 316L1.4432S316030,302,000,750,0400,01516,50-18,0010,50-13,002,50-3,00
TP 316L1.4435S316030,302,001,000,0450,01517,00-19,0012,50-15,002,50-3,00
TP 3161.4436S316000,052,001,000,0450,01516,50-18,5010,50-13,002,50-3,00
TP 317L1.4438S317030,302,001,000,0450,01517,50-19,5013,00-16,003,00-4,00
TP 32114.541S321000,082,001,000,0450,01517,00-19,009,00-12,00
254SMO1.4547S312540,021,000,700,0300,01019,50-20,5017,50-18,506,00-7,00
TP 316TI14.571S316350,082,001,000,0450,01516,50-18,5010,50-13,502,00-2,505 x C
TP 3091.4828S309000,202,001,50-2,500,0450,01519,00-21,0011,00-13,00
TP 309S1.4833S309080,152,001,000,0450,01522,00-24,0012.00-14,00
TP 310S1.4845S310080,102,001,500,0450,01524,00-26,0019,00-22,00
TP 321H14.878S321090,102,001,000,0450,01517,00-19,009,00-12,005 x C
TP 316H14.919S316090,04-0,102,000,750,0400,03016,00-18,0011,00-14,002,00-3,00
TP 304 H14.948S304090,04-0,082,001,000,0350,01517,00-19,008,00-11,00
TP 904L1.4539N089040,022,000,700,0300,01019,00-21,0024,00-26,004,00-5,00
Gradi degli acciai austeno-ferritici
ASTMDIN ENUNSC
≤ %
MN
≤ %
SI
≤ %
P
≤ %
S
≤ %
CR
%
NI
%
MO
%
N
%
Alloy 25071.4410S372500,0302,001,000,0350,01524,00-26,006,00-8,003,00-4,500,24-0,35
Alloy 22051.4462S318030,0302,001,000,0350,01521,00-23,004,50-6,502,50-3,500,10-0,22
Alloy 1001.4501S327600,0301,001,000,0350,01524,00-26,006,00-8,003,00-4,000,20-0,30
Alloy 241.4565S345650,0305,00-7,001,000,0300,01524,00-26,0016,00-19,004,00-5,000,30-0,60
Gradi delle leghe speciali in nichel
ASTMDIN ENUNSC
≤ %
MN
≤ %
SI
≤ %
P
≤ %
S
≤ %
CR
%
NI
%
MO
%
Fe
%
Alloy C2762.4819N102760,0101,000,080,0200,01514,5-16,5Rest15,0-17,04,00-7,00
Alloy 6252.4856N066250,03-0,100,500,500,020,01520,00-23,00? 58,08,00-10,05,00
Alloy 8252.4858N088250,0251,000,500,020,01519,50-23,5038,00-46,002,50-3,50Rest

DIMENSIONAL STANDARD TOLERANCES

ASTM A213 – 269 – A450 – A1016
Seamless and Welded TubesOutside DiameterThickness Minimum WallAverage Wall
<25,40 mm.+0,10 – 0,10 mm.+20% – 0+10% – 10%
25,50 mm. – 38,10 mm.+0,15 – 0,15 mm.+20% – 0+10% – 10%
38,10 mm. – 50,80 mm.+0,20 – 0,20 mm.+22% – 0+11% – 11%
ASTM 269 – A450 – A1016
Seamless and Welded TubesOutside DiameterThickness
Up to 12,70 mm.+0,13 – 0,13 mm.+15% – 15%
12,70 mm. to 38,10 mm.+0,13 – 0,13 mm.+10% – 10%
From 38,10 mm. to 50,80 mm.+0,25 – 0,25 mm.+10% – 10%
ASTM A312 – A530 – A1016
Seamless and Welded TubesOutside DiameterThickness
From 10,26 mm. to 48,26 mm.+0,40 – 0,80 mm.+20% – 12,5%
From 48,26 mm. to 60,30 mm.+0,80 – 0,80 mm.+22% – 12,5%
ASTM A249 – A450 – A1016
Seamless and Welded TubesOutside DiameterThickness Minimum WallAverage Wall
<25,40 mm.+0,10 – 0,10 mm.+20% – 0+10% – 10%
25,50 mm. – 38,10 mm.+0,15 – 0,15 mm.+20% – 0+10% – 10%
38,10 mm. – 50,80 mm.+0,20 – 0,20 mm.+22% – 0+11% – 11%
ASTM A789/790 – S31803 – A1016
Seamless and Welded TubesOutside DiameterThickness
Up to 12,70 mm.+0,13 – 0,13 mm.+15% – 15%
12,70 mm. to 38,10 mm.+0,13 – 0,13 mm.+10% – 10%
From 38,10 mm. to 50,80 mm.+0,25 – 0,25 mm.+10% – 10%
GENERAL ISO TOLERANCES – DIN 2462
Tolerances ClassMaximum tolerance outside diameter
D1+/- 1,50% with min. +/-0,75 mm
D2+/- 1,00% with min. +/-0,50 mm
D3+/- 0,75% with min. +/-0,30 mm
D4+/- 0,50% with min. +/-0,10 mm
Tolerances ClassMaximum tolerance outside diameter
T1+/- 15,00% with min. +/-0,60 mm
T2+/- 12,50% with min. +/-0,40 mm
T3+/- 10,00% with min. +/-0,20 mm
T4+/- 7,50% with min. +/-0,15 mm