CITY GAS DISTRIBUTION (Energy that creates a better path): DOWNSTREAM PIPING MATERIAL SPECIFICATION & STANDARDS

Thursday, February 11, 2021

DOWNSTREAM PIPING MATERIAL SPECIFICATION & STANDARDS

  ASME STANDARDS

ASME B 16.5 Pipe flanges and flanged fittings up to 24” 

ASME B16.34 Valves-flanged and Butt welding ends

ASME B 31.8 Gas transmissions and distribution piping system 

ASME VIII, DIV-I Boiler and Pressure Vessel code

ASME B 16.9 Factory-made wrought steel butt welding fittings 

ASME B 31.3 Process piping


ASTM STANDARDS

ASTM A 53/A 53 M Pipe steel black and hot dipped, Zinc-Coated, Welded and seamless

 ASTM A 105/A 105 M Forgings, Carbon steel, for piping components

ASTM A193/A 193 M Alloy steel and stainless steel bolting materials for high temperature services.

ASTM A194/A194 M Carbon and alloy steel nuts for bolts for high temperature Services

ASTM A234/A 234 M Piping, fitting, of wrought carbon steel and alloy steel for moderate and                                                     elevated temperature

ASTM A 370 Mechanical testing of steel product

ASTM A 515 Pressure vessel plate, carbon steel for intermediate and higher temperature services

ASTM A 516 Pressure vessel plate, carbon steel for intermediate and higher temperature services

ASTM A 707/A 707 M Flanges, forged, carbon and alloy steel for low temperature Service


API STANDARDS

API 5L Specification for line pipe

API 1104 Specification for welding pipeline and related facilities

API 6D Specification for pipeline valves (Ball, Gate, Plug Ball and Check Valves)

API 6 FA (Spec 6 FA) Specification for fire Test for valves

BS 5351 Specification of small size valves (Below 2”)


ISO STANDARDS

ISO 148 Determine the impact strength of steel and energy absorbed by charpy.

ISO 9001 Quality Management Standards


OIL INDUSTRY SAFETY DIRECTORATE (OISD STANDARDS)

OISD-GGN-115 Guidelines on fire fighting, Equipment and appliances in Petroleum industry

OISD-standard-113 Hazardous area classification

OISD-Standard-163 Process Control Room Safety


MATERIAL SPECIFICATION OF PIPING SYSTEM

Materials to be used for piping system shall comply with the minimum requirements of relevant standards & codes.

Pipes - ASTM A106 Gr. B (Seamless)/API 5L Gr.B/ IS-ASTM A53/A53 M Gr.B/ 1239Heavy

Flanges - ASTM A105/ A 105

Restricting Orifice* plate - SS 304

Rubber Gasket (washer) - High Nitrile Synthetic Rubber Grade 215

Fittings - ASTM A234 Gr WPB

Ball Valves - A 105/A 216 Gr WCB

Insulation - NA

Insulating gasket - Same as Pipe (Ring A 105)

Spiral Wound Gasket (washer) - ANSI B 16.20

Nuts and Bolts - hot dipped galvanized as per ASTM A53

Rubber hose - Type-4 as per IS:9573

Painting - As per enclosed 

The size of orifice of restricting orifice plate shall be 11 mm for G10/G16/G25, 13mm for G40 and 15mm for G65 RPD meter.

The size of orifice of rubber gasket (washer) shall be 5mm for G4, 8mm for G6, 10mm for G10 & G16 and 13mm for G25 Diaphragm meter.



Wall Thickness Calculation

Pipes for natural gas shall comply with ASME/ANSI B 31.8 code. Pipe wall thickness will be calculated as follows:




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