Specifications For Pipe/Tube and Accessories

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American Specifications

ASTM standards are the most commonly used standards for stainles steel and alloy materials, we also use ASME standards for tubes and pipes or other materials, sometimes customers also require NACE MR-0175 and MIL-P-24691 compliant.

European Standards

We also produce according to EN(European Standards) as customer's request, ISO standards, British Standards, DIN standards, Such as EN 10216-5, EN10216-7, EN10204, ISO 15156, DIN 17456, DIN 17458 ...

Russian Standards

Russian Standards are started with GOST, we can supply pipe and tubes according to GOST 9941, fittings and flanges according to GOST 17375, GOST 17376, GOST 17378, GOST 33259...

ASTM A312 / A312M - Standard Specification for Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes
Key PointsContent
Main Grades TP304,TP304L, TP304H, TP309S, TP310S, TP310H, TP316, TP316L, TP316H, TP316Ti, TP317L, TP321, TP321H, TP347H, N08904, N08926...
Order Information1.Standard No. and Grade, 2. Seamless or Welded, 3. Size(inch/Sch or OD(MM)*WT(MM)), 4.Quantity, 5.Plain or Beveled Ends, 6. other requirements
OD Tolerance OD(1/8",1 1/2"] : +0.015/-0.031
OD(1 1/2",4"] : +0.031/-0.031
OD(4",8"] : +0.062/-0.031
OD(8",18"] : +0.093/-0.031
OD(18",26"] : +0.125/-0.031
OD(26",34"] : +0.156/-0.031
OD(34",48"] : +0.187/-0.031
WT Tolerance OD(1/8",2 1/2"] : +20%/-12.5%
OD(3",18"] t/d up to 5%: +22.5%/-12.5%
OD(3",18"] t/d larger than 5% : +15%/-12.5%
OD 20" and larger welded : +17.5%/-12.5%
OD 20" and larger seamless t/d up to 5% : +22.5%/-12.5%
OD 20" and larger seamless t/d larger than 5% : +15%/-12.5%
Required Tests chemical composition
Tensile Strength and Yield Strength
Anealing and Pickling
Flattening
transverse-guided face bend
Eddy Current, Hydraulic or Ultrosonic
  • PS: Some grades are with different chemical content in specification with defferent year of edition, for instance, the TP316 is with 11% Ni in old A312 standards, and with 10% Ni in new A312 standard 2017 and later edition, so please specify year of eidtion when order.
ASTM A213 / A213M - Standard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes
Key PointsContent
Main Grades TP304,TP304L, TP304H, TP309S, TP310S, TP310H, TP316, TP316L, TP316H, TP316Ti, TP317L, TP321, TP321H, TP347H, N08904, N08926...
Order Information1.Standard No. and Grade, 2. average or minimum wall, 3. Size(OD(mm)*WT(mm)*length), 4.Quantity, 5.hydraulic or NDT(ET,UT), 6. other requirements
OD Tolerance OD under 1" : +0.004/-0.004
OD(1",1 1/2"] : +0.006/-0.006
OD(1 1/2",2"] : +0.008/-0.008
OD(2",2 1/2"] : +0.010/-0.010
OD(2 1/2",3"] : +0.012/-0.012
OD(3",4"] : +0.015/-0.015
OD(4",7 1/2"] : +0.015/-0.025
OD(7 1/2",9"] : +0.015/-0.045
WT Tolerance Average Wall : +10%/-10%
Minimum Wall:
OD 1 1/2" and under: +20%/-0
OD over 1 1/2" : +22%/-0
Required Tests chemical composition
Tensile Strength and Yield Strength
Anealing and Pickling
Flattening
Hardness
Flaring
Eddy Current, Hydraulic or Ultrosonic
  • PS: A213 Tube are with minimum wall thickness if customer doesn't specify average wall, price for minimum wall is about 8% to 10% higher than price of average wall tube, it is important to specify mimimum wall or average wall for ordered tubes.
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