What is the difference between P235GH TC1 and TC2?

TC1 stands for Test Category 1 and TC2 stands for Test Category 2 per EN 10216-2. TC2 requires mandatory Charpy V-notch impact testing at specified low temperatures (-20°C or 0°C) and non-destructive examination (NDE), making it suited for critical pressure vessels and cryogenic interfaces, whereas TC1 is for standard temperature applications.

Which flange types are manufactured in P235GH?

We forge and machine Weld Neck Flanges (Type 11), Blind Flanges (Type 05), Slip-On Flanges (Type 12), Plate Flanges (Type 01), Threaded Flanges (Type 13), Lap Joint Flanges (Type 02/04), and Spectacle Blinds across PN 6 to PN 400 and Class 150 to Class 2500.

Do you provide EN 10204 3.1 inspection certificates for P235GH flanges?

Yes, every batch of P235GH flanges is delivered with authentic EN 10204 3.1 mill test certificates documenting actual ladle chemistry, room/elevated temperature mechanical properties, impact values, heat treatment batch numbers, and third-party inspection endorsements upon request.

P235GH Flange Manufacturer & Stockist in India

Q: What is P235GH material and its ASTM equivalent?

P235GH (EN numeric 1.0345) is a European standard non-alloy carbon steel formulated for elevated temperature and pressure vessel applications per EN 10028-2 and EN 10216-2. Its closest ASTM equivalent is ASTM A105 for forgings and ASTM A106 Grade B or A234 WPB for piping and fittings.

EN 1092-1 / ASME B16.5 Pressure Vessel Steel

P235GH (Werkstoff 1.0345) Carbon Steel Flanges Manufacturer in India

Rajtilak Metal is an ISO 9001:2015 certified, EIL and IBR approved manufacturer and exporter of European standard P235GH Flanges in Mumbai, India. Formulated under EN 10028-2 and EN 10216-2 specifications, P235GH (EN numeric designation 1.0345) is a non-alloy quality carbon steel engineered specifically for elevated temperature and pressurized service environments such as industrial steam boilers, heat exchangers, pressure vessels, and petrochemical reactors.

P235GH Weld Neck Flange

Carbon Steel P235GH Plate Flange

Pressure Vessel Steel P235GH Blind Flange

Table Of Technical Contents

Overview: What is P235GH Steel?

P235GH TC1 vs P235GH TC2 Difference

P235GH Socket Weld & Slip-On Integrity

Chemical Composition (EN 10216-2 / EN 10028-2)

P235GH TC2 Mechanical Properties

Manufacturing Specification Scope

ASME & EN Pressure Vessel Flange Dimensions

EN 10216-2 P235GH TC1 Theoretical Weight Chart

Pressure-Temperature Ratings (Class 150 to 2500)

Wall Thickness Schedule Reference

Flange Bolting & Stud Dimension Chart

Standard Flange Types (WNRF, BLRF, SORF)

Key Metallurgy & Material Equivalents

EN 1.0345 Non-Alloy Carbon Steel possesses balanced carbon-manganese ratios optimized for high ductile toughness, thermal resistance, and superior weldability without obligatory preheating in standard wall configurations. In normalized conditions, P235GH provides reliable yield strength above 235 MPa at ambient temperatures. Its international equivalents include ASTM A105 (for forged flanges), ASTM A106 Gr B / ASTM A234 WPB (for seamless pipes & buttweld fittings), DIN 17155 HII, and BS 1501-161-430A.

What are P235GH Pressure Vessel Steel Flanges?

In a normalized condition, P235GH pressure vessel steel flanges exhibit moderate thermal conductivity and excellent ductility paired with uniform grain structure. Engineered under the European Pressure Equipment Directive (PED 2014/68/EU), this non-alloy steel retains design yield strength across high thermal gradients up to 400°C (752°F). Procurement engineers globally trust our P235GH forged flanges in critical refining furnaces, district heating systems, and thermal power headers.

P235GH TC1 vs. P235GH TC2: Quality Classifications

P235GH TC1 (Test Category 1) is designated for general commercial pressure systems where standard tensile, yield, and room temperature elongation tests are sufficient. P235GH TC2 (Test Category 2) satisfies elevated safety mandates by enforcing Charpy V-notch transverse impact verification at low temperatures (-20°C, 0°C, +20°C) alongside mandatory non-destructive ultrasonic and eddy current testing across each forging run.

Slip-On (SORF) and Socket Weld (SWRF) Design Features

Hubbed P235GH slip-on flanges (EN 1092-1 Type 12) feature a slightly enlarged inner bore diameter compared to the pipe outer diameter, enabling easy alignment, inspection, and maintenance modification. Alternatively, P235GH socket weld flanges (EN 1092-1 Type 14 / ASME B16.11) deliver superior fatigue endurance in cyclic, high-vibration applications due to concentrated single-fillet weld geometries and bored internal shoulders that eliminate restrictive flow turbulence.

P235GH Chemical Composition (Ladle Analysis %)

Element	Composition (%)	Element	Composition (%)
Carbon (C)	0.16 – 0.20 max	Silicon (Si)	0.35 max
Manganese (Mn)	0.60 – 1.20	Phosphorus (P)	0.025 max
Sulfur (S)	0.015 max	Chromium (Cr)	0.30 max
Nickel (Ni)	0.30 max	Molybdenum (Mo)	0.08 max
Copper (Cu)	0.30 max	Vanadium (V)	0.02 max
Nitrogen (N)	0.012 max	Aluminium (Al Total)	0.020 min

P235GH TC2 Mechanical Properties Across Thickness Ranges

Grade	Wall Thickness (mm)	Yield Strength ReH (MPa min)	Tensile Strength Rm (MPa)	Elongation A5 (% min)	Min Impact Energy KV (Joules)
Grade	Wall Thickness (mm)	Yield Strength ReH (MPa min)	Tensile Strength Rm (MPa)	Elongation A5 (% min)	-20°C	0°C	+20°C
P235GH (1.0345)	≤ 16 mm	235	360 – 480	24	27 J	34 J	40 J
	> 16 to ≤ 40	225	360 – 480	24	27 J	34 J	40 J
	> 40 to ≤ 60	215	360 – 480	24	27 J	34 J	40 J
	> 60 to ≤ 100	200	360 – 480	24	27 J	34 J	40 J
	> 100 to ≤ 150	185	350 – 480	24	27 J	34 J	40 J
	> 150 to ≤ 250	170	340 – 480	24	27 J	34 J	40 J

Carbon Steel P235GH Flange Manufacturing Specifications

Standard Scope	EN 1092-1, ASME B16.5, ASME B16.47 Series A & B, DIN 2501, BS 4504, JIS B2220, UNI
Pressure Ratings	EN Metric: PN 6, PN 10, PN 16, PN 25, PN 40, PN 63, PN 100, PN 160, PN 250, PN 400 ASME Imperial: Class 150, 300, 400, 600, 900, 1500, 2500
Size Range	1/2″ to 24″ (ASME B16.5) / DN 15 to DN 2000 (EN 1092-1) / 26″ to 60″ (ASME B16.47)
Flange Facings	Raised Face (RF / Type B1-B2), Flat Face (FF / Type A), Ring Type Joint (RTJ), Tongue & Groove (TG), Male & Female (MF)
Flange Configurations	Weld Neck (Type 11), Blind (Type 05), Slip On (Type 12 / SORF), Plate (Type 01), Loose / Lap Joint (Type 02 / 04), Threaded (Type 13 / NPT-BSPT), Socket Weld (Type 14)
Special Custom Flanges	Spectacle Blinds, Spade & Spacer, Orifice Flanges (ASME B16.36), Long Weld Neck (LWN), Nipoflange, Weldoflange, Reducing Flange
Inspection & Certification	EN 10204 Type 3.1 Mill Test Certificate, PED 2014/68/EU Annex I Paragraph 4.3, NACE MR0175 / ISO 15156, Third-Party Inspection (TUV, DNV, BV, Lloyds, SGS)
Surface Protection	Rust-preventative black paint, anti-rust transparent varnish, light oil coating, hot-dip galvanizing, electro-galvanized zinc

Pressure Vessel Flanges Dimensions — Class 150 (Inches)

NPS	O.D. (O)	Thk (Q)	RF Dia (R)	Base Hub (X)	Length WN (Y)	Length SO (Y)	Bore WN (B)	Bevel Dia (H)
1/2″	3.50	0.44	1.38	1.19	1.88	0.62	0.62	0.84
3/4″	3.88	0.50	1.69	1.50	2.06	0.62	0.82	1.05
1″	4.25	0.56	2.00	1.94	2.19	0.69	1.05	1.32
1-1/2″	5.00	0.69	2.88	2.56	2.44	0.88	1.61	1.90
2″	6.00	0.75	3.62	3.06	2.50	1.00	2.07	2.38
3″	7.50	0.94	5.00	4.25	2.75	1.19	3.07	3.50
4″	9.00	0.94	6.19	5.31	3.00	1.31	4.03	4.50
6″	11.00	1.00	8.50	7.56	3.50	1.56	6.07	6.63
8″	13.50	1.12	10.62	9.69	4.00	1.75	7.98	8.63
10″	16.00	1.19	12.75	12.00	4.00	1.94	10.02	10.75
12″	19.00	1.25	15.00	14.38	4.50	2.19	12.00	12.75

EN 10216-2 P235GH Flange Theoretical Weight Chart (kg)

Nominal Size (NPS)	Slip-On (SORF)	Threaded (NPT)	Socket Weld (SWRF)	Blind (BLRF)	Weld Neck (WNRF)
1/2″	1.0	1.0	1.2	1.5	1.8
3/4″	1.5	1.5	1.6	2.0	2.3
1″	2.0	2.0	2.1	2.3	2.8
1-1/2″	3.0	3.0	3.2	3.9	4.2
2″	4.5	4.5	4.7	5.2	5.8
3″	8.5	8.5	8.8	9.5	11.2
4″	12.8	12.8	13.1	16.8	16.4
6″	18.5	18.5	19.0	26.5	25.8
8″	29.5	29.5	30.0	46.5	41.5
10″	42.0	42.0	42.5	69.0	53.5
12″	63.0	63.0	63.5	121.0	87.0

P235GH Maximum Allowable Working Pressure (psig)

Temp (°F)	Class 150	Class 300	Class 600	Class 900	Class 1500	Class 2500
-20 to 100°F	275	720	1440	2160	3600	6000
200°F	230	600	1200	1800	3000	5000
300°F	205	540	1080	1620	2700	4500
400°F	190	495	995	1490	2485	4140
500°F	170	465	930	1395	2330	3880
600°F	140	435	875	1310	2185	3640
700°F	110	425	850	1275	2125	3540
800°F	80	405	805	1210	2015	3360

P235GH Weld Neck Flange Bolting Standards

Nominal Pipe Size	Class 150 Flanges			Class 300 Flanges			Class 600 Flanges
Nominal Pipe Size	Qty	Bolt Dia (in)	Stud Length	Qty	Bolt Dia (in)	Stud Length	Qty	Bolt Dia (in)	Stud Length
1/2″	4	0.50	2.25″	4	0.50	2.50″	4	0.50	3.00″
3/4″	4	0.50	2.50″	4	0.62	3.00″	4	0.62	3.50″
1″	4	0.50	2.50″	4	0.62	3.00″	4	0.62	3.50″
1-1/2″	4	0.50	2.75″	4	0.75	3.50″	4	0.75	4.25″
2″	4	0.62	3.25″	8	0.62	3.50″	8	0.62	4.25″
3″	4	0.62	3.50″	8	0.75	4.25″	8	0.75	5.00″
4″	8	0.62	3.50″	8	0.75	4.50″	8	0.88	5.75″
6″	8	0.75	4.00″	12	0.75	4.75″	12	1.00	6.75″
8″	8	0.75	4.25″	12	0.88	5.50″	12	1.12	7.50″

Factory Manufacturing Types of P235GH Flanges

P235GH Threaded Flange

P235GH Socket Weld Flange

P235GH Plate Flange

P235GH Lap Joint Flange

P235GH TC1 Blind Flange

P235GH Spectacle Blind

P235GH Slip On Flange

P235GH Reducing Flange

ISO 9001:2015 PED 2014/68/EU Certified EIL & IBR Approved EN 10204 3.1 Traceable

Frequently Asked Questions — Technical Guidance

What is P235GH material and its ASTM equivalent?

P235GH (Werkstoff 1.0345) is a European standard non-alloy carbon steel designated for elevated-temperature service in boilers, pressure vessels, and steam piping. Its primary equivalents include ASTM A105 for forged flanges, and ASTM A106 Grade B or ASTM A234 WPB for piping and buttweld components.

What is the difference between P235GH TC1 and P235GH TC2?

Test Category 1 (TC1) specifies standard ambient mechanical verification. Test Category 2 (TC2) demands mandatory low-temperature Charpy V-notch impact verification (down to -20°C) alongside 100% non-destructive ultrasonic examination across each forged billet, making TC2 mandatory for critical and hazardous pressure vessels.

Which flange facings are available in P235GH?

We machine Raised Face (RF / Type B1-B2), Flat Face (FF / Type A), Ring Type Joint (RTJ), Tongue and Groove (TG), and Male/Female (MF) facings with smooth (Ra 3.2–6.3 μm) or serrated finishes complying with EN 1092-1 or ASME B16.5 standards.

Do you supply EN 10204 3.1 mill test certificates?

Yes. Every export shipment is dispatched with certified EN 10204 3.1 MTCs showing exact ladle chemical composition, room and elevated temperature tensile values, Charpy impact test results, heat treatment cycles, and hardness values traceable to the steel heat number stamped on each flange.

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P235GH Flange & EN 10216-2 P235GH TC1/TC2 Flanges