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Dears; I have to weld a weldoloet on a small piece of pipe. This small piece of pipe is buttwelded to 02 weldneck flanges from each side. I would like to know the minimum distance that I have to provide from the weld (buttweld between pipe and WN flange) to the fillet weld (of the weldolet on...

Dears; Could you please explain the use of these different pigs: a)Brush pig: b) Gauging pig c) Cup Pig d) Foam Pig Many thanks

Dear Specialist; I’m facing a problem of upheaval buckling of a gas injection buried pipeline. Originally the pipeline was buried 1meter below the ground (01 meter from ground to the top of the 10” pipeline). As you can see in the attached photo, due to thermal expansion, the pipeline is coming...

Dears Specialist; I have to purchase a 1" Globe Valve, 450 Bars Hub ended, designed to 450 bar for (-35°C to 170°C), RB, OS & Y, Press Seal Bonnet, Metal Seated. I have to dictate to Suppliers which standard is applicable but I don't have any idea. I know that face to face dimension of such...

Hi every specialist; Could someone explain in which case we shall specify ASTM A105N instead of A105 as a body valve material? Is A105 technically acceptable as alternative material when A105N is specified by client specification? Thanks

Dear Specialists: Is there any body in this forum who has experience with Above Ground pipelines (continuously in contact with soil) modeling using Caesae software? Thanks

Hi every specialist; As you know CAESAR software doesn't include a special module for above ground pipelines. The Buried Pipe Modeler is intended for underground pipes, but some specialists used to use this Modeler for above ground pipeline (continuously supported by the soil) and they provide...

Hi every specialist; I'm reading ASME B16.9 code and I found in paragraph 9 ''Design Proof Test'' this statement: ''Proof test shall be made when the manufacturer chooses proof testing to qualify the fitting design’’. That means Manufacturer can choose another method to qualify the design of...

Hi every body Does anyone provide inspection dossier to ARH (previously named DPP). DPP or ARH is Algerian Authority inherent to petroleum equipments. Many thanks

Can someone explain the suitability of RPTFE and PCTFE for ball valve seating? Can we say that PEEk is the best seat material?

Hi every body; Can someone explain what "UL Listed" and "FM Approved" requirement for valves? Thanks

Hi every specialist; Our stress group gave me loads on a support.The support is fixed stool at elbow type. Elevation is 1.2m from BOP (bottom of pipe), pipe stool is 4" SCH 40. Do someone have any idea how to calculate allowable loads of such kind of supports? Thanks

Good morning; I'm about to design piping system inside oil production wellhead. Around 5 meters from Xmass tree I'll arrange a choke valve. My concerns is dealing with supporting this choke valve. I'd like to know if choke valve behavior is same as PSV. PSV need its connected pipe to be...

Hi every specialist; I'm doing design of wellhead piping system on desert (Sahara). I'm planning to not provide supports for flare line part outside the fence, just let the pipe laid down above ground on the sand. Do you think that Client will have any reason to reject this design? Thanks

Hi Every sepecialist; I have some questions dealing with Wellhead facilities and I need someone to help me. 1) Very often in API 6A Christmas tree literature, we heard about "up rating" or "rectifying" API 5000 psi Xmass tree to 6650 psi class. I looked through API 6A standard and I didn't...

Dear Specialist; In offsite facilities (wellhead and manifolds) we very often use A694 Gr X60 or X65 ...etc. flanges. I looked through standards but I found that this material is not endorsed by ASME B16.5 and B16.34. I found this material only in MSS SP-44 which covers class up to 900 only...

Hi Every specialist: I have an API 6D ball valve that shall sustain 450 bar @ 70°C. This presseure is over CL2500. Gas service, none corrosive. Client specification stipulated that it shall be an uprated valve. Can someone explain me what shall be an uprated valve? Is uprating done based on...

Hello Specialists; Can ASTM A487 Gr 4C be alternative material (valve body material ) to A216 WCB specified in Client Piping Material specification? In other words the problem is as follows: Client piping specification stipulates A216 WCB as check valve body matrial. Vendor is propsing A487 Gr...

Hello Specialists; Can ASTM A487 Gr 4C be alternative material (valve body material ) to A216 WCB specified in Client Piping Material specification? In other words the problem is as follows: Client piping specification stipulates A216 WCB as check valve body matrial. Vendor is propsing A487 Gr...