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Not recommended using PE pipe with extra large size. Why dont use double or triple lines instead of single line, with smaller size. It will be costly, but provide more safety,reliability,and easy for installation.

For orifice type, not always 10D upstream or 5D downstream for FO placement, it depend on piping run length, D/d (pipe bore/orifice hole), flow conditioner, and piping end configuration. As well as, any obstruction not allowed to be placed inside meter tube (upstream + downstream ) except only...

I think you talk about stub-in for pipe branching. Yes, this is one of methode accepted such as by ASME 31.3 (Appendix H), ASME 31.8 ( App-F) for pressure strength whether reinforcement pad is required. Practically you can use FEA or pipe stress software to assess and include thermal influence.

First, make sure you allowable stress whether designed for elevated temperature. Check most identical material to Table A-1, then see rating from B16.5 whether >2500.

The piping system already installed. I think, you should perform the draining test with such tapping usage scenario, and state the maximum and minimum flow during peak condition

Say, you have 100 m length of pipe rack. The height difference between pipe end will be 1 % x 100 m = 1 m. It is not common to design pipe shoe with above 1 m height. As I have applied in the past project, the steam line is located on highest level of P/R, then apply pipe shoe with height...

I think, you shall cool it by fan cooler prior buried this pipe. Otherwise it will be trouble for corrosion protection system and buckle stress. What standard is used ? For B31.8 gas pipeline, stress over yield is still allowed by maximum strain 2.5 %. Consult the CP protection specialist how...

Use A694-F? for forged, A860-WPHY? for fitting, A352-LCC for cast, A516 for plate. You shall suit the sch for not equal API-X?? grade.

Pipeline usually design for 20 or 25 years. 27 years in service without regularly ILI and cleaning ??? What kind of material used ? Have company planned replacement pipe after 25 years or integrity ? Anyway this stuck area shall be cut and replaced. Then you dare to proceed pigging with stuck...

Metallic reinforced plastic pipe with >6" size, sounds like the great material instead of steel pipe,even better for corrosive water pipeline service in low temperature. But pipe load in service always the combination of P,T,&external load in 3 direction, and we cannot predict with any code how...

Hi All, I want to ask for any expert here, how to perform stress analysis for above material and what kind of code/standard ? Is BS7159/UKOOA ( for GRP/GRE pipe) applicable for it ? The pipe will be buried with 8" size, 60 C.deg, and 2300 psig, with 30 km length as water pipeline. Rgrds,

What is the design thickness code for flowline pipe with design pressure 8000 psia, API 5L X65 CRA 625 Clad, Nom Size 6" ?

BigInch, Thanks for advice, but please give your reason base on code requirement. Really confused to decide. SJones, B16.9 say only about thickness, not grade to rate the fittings.

Thanks for all response, Here I just ordered to verified existing fabricated spool which consist of pipe API-X42 connected to A105(Flange #300) and A234-WPB(fitting). This spool will be operated at following condition : Design code: B31.8 Design Pressure/Temperature = 50 bar / 66 C OD : 16 inch...

BigInch, I agree with u, since this is common rule to equal grade and thickness. But if we see 31.8 : t=PD/(2FES), which include design factor F=0.4 in this case, only used for PIPE not for other component (fitting, flange,etc). Why shall be same in grade and thickness ? Regards,

Hi all pipeliner, Can we use fitting A234 for Pipe X42 ( use B31.8code ) with same schedule 12.7 mm ? As we know , design factor(F) shall be considered in Thickness calculation of B31.8 for pipe. But no rules to calculate Fitting thickness with including design factor in this code.

Hi, Need your advice for small problem, Can cicumferential stress by live load at API RP1102 combined with hoop stress of B31.8 ? Thank's

Here is what this code ( ASME B31.3 )said, if pressure rating excess #2500 psig : K304.8 Fatigue Analysis K304.8.1 General. A fatigue analysis shall be performed on each piping system, including all components and joints therein, and considering the stresses.....etc this analysis shall be in...

DCBII, Sounds like you piping just subjected to weight load, and no complexity as like in processing plant. But, pipe rows included 24" fully water filled will be a big ton. For general rule in process piping : Use pipe sleepers with 6 m span. Add weight pipe load margin about 10% ~ 30 %. Put...

Anchored critical line pipe laid on your pipe rack or post may require stress analysis. You need pipe thermal trust load, slug load, or wind load to be considered in your design or your structure will be damage.